Magic the Gathering: Mechanics Storm Scale Chart

Adapted from this image created by justhereforhides.

Those of you who read Mark Rosewater's blog probably know the Storm Scale. If you don't, you should start reading it. It's pretty good. Anyway, the Storm Scale rates Maro's subjective estimation of how likely it is for a certain mechanic/theme/card to be (re-)printed in an expert expansion on a scale from 1 to 10:

Evergreen
Inevitable
Almost Certain
Strong Chance
Most Likely
More Likely than Not
Maybe
Unlikely
Long Shot
Close to Never
Almost Impossible

Effect	Rules Text	Blocks	Rating
Evergreen	Deathtouch, Defender, Double Strike, Enchant, Equip, Fight, First Strike, Flash, Flying, Haste, Hexproof, Indestructible, Lifelink, Menace, Prowess, Reach, Regeneration, Scry, Trample, Vigilance.	All	0
Color Hybrid	Mana costs that can be paid with two different colors of mana.	Ravnica Shadowmoor Return to Ravnica	1
Cycling	Discard this card: Draw a card.	Urza's Onslaught Time Spiral Alara	1
Flashback	You may cast this card from your graveyard for its flashback cost. Then exile it.	Odyssey Time Spiral Innistrad	1
Landfall	Whenever a land enters the battlefield under your control, [effect].	Zendikar	1
Scry	Look at the top N cards of your library. Put any number of them on the bottom of your library and the rest on top in any order.	Mirriodin Future Sight Magic 2011 Theros	1
Convoke	Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.	Ravnica	2
Devotion	Each [symbol] in the mana costs of permanents you control counds towards your devontion to [symbol].	Theros	2
Proliferate	You choose any number of permanents and/or players with counters on them, then give each another counter of a kind already there.	Scars of Mirrodin	2
Protection	This can't be blocked, targeted, dealt damage, or enchanted by anything (quality)	Formerly Evergreen	2
Unearth	[Cost]: Return this card from your graveyward to the battliefield. It gans haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.	Alara	2
Battle Cry	Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.	Scars of Mirrodin	3
Double-faced cards	Cards with two faces.	Innistrad	3
Cascade	When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.	Alara	3
Evoke	You may cast this spell of its evoke cost. If you do, it's sacrificed when it enters the battlefield.	Lorwyn	3
Exalted	Whenever a creature you control attackes alone, that creature gets +1/+1 until end of turn.	Alara Magic 2013	3
Infect	This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.	Scars of Mirrodin	3
Monocolor Hybrid	Colored mana costs that can alternatively be paid with {2}.	Shadowmoor	3
Landwalk	This creature can't be blocked as long as defending player controls a relevant land	Formerly Evergreen	3
Persist	When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under it's owner's control with a -1/-1 counter on it.	Shadowmoor	3
Rebound	If you cast this spell from your hand, exil it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost	Zendikar	3
Bushido (Renamed)	When this blocks or becomes blocked, it gets +N/+N until end of turn.	Champions of Kamigawa	4
Changeling	This card is every creature type at all times	Lorwyn Shadowmoor	4
Domain	[Effect], for each basic land type among lands you control	Invasion Time Spiral Alara	4
Entwine	Choose both (modular options) if you pay the entwine cost.	Mirrodin	4
Grandeur	Discard another card named [Card Name]: Effect.	Time Spiral	4
Imprint	Exile a card [effect based on exiled card].	Mirrodin Scars of Mirrodin	4
Miracle	You may cast this card for its Miracle cost when you draw it if it's the first card you drew this turn.	Innistrad	4
Totem Armor	If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.	Zendikar	4
Undying	When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.	Innistrad	4
Chroma	[Effect] for each [color] symbol in its mana cost.	Time Spiral Shadowmoor	5
Curse	Enchant player subtype.	Innistrad	5
Morbid	[Effect], if a creature died this turn.	Innistrad	5
Morph	You may cast this face down as a 2/2 creature for Turn it face up any time for its morph cost.	Onslaught Time Spiral	5
Soulbond	You may pair this creature with another unpaired creature when either enters the battlefield. They remain paired for as long as you control both of them.	Innistrad	5
Affinity	This spell costs less to cast for each [factor] you control.	Mirrodin	6
Buyback	You may pay an additional [cost] as you cast this spell. If you do, put this card into your hand as it resolves.	Tempest Time Spiral	6
Champion	When this enters the battlefield, sacrifice it unless you exile another [factor] you control. When this leaves the battlefield, that card returns to the battlefield.	Lorwyn	6
Living Weapon	When this Equipment enters the battlefield, put a 0/0 black Germ creature token onto the battlefield, then attach this to it.	Scars of Mirrodin	6
Ninjutsu (Renamed)	[Cost]: Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking	Kamigawa	6
Annihilator	Whenever this creature attacks, defending player sacrifices N permanents.	Zendikar	7
Devour	As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with that many +1/+1 counters on it.	Alara	7
Fear	This creature can't be blocked except by artifact creatures and/or black creatures.	Formerly Evergreen	7
Intimidate	This creature can't be blocked except by artifact creatures and/or creatures that share a color with it	Formerly Evergreen	7
Kinship	At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with [Card Name], you may reveal it. If you do, [effect].	Lorwyn	7
Level Up	[Cost]: Put a level counter on this. Level up only as a sorcery.Factors based on creatures level.	Zendikar	7
Metalcraft	As long as you control three or more artifacts, [effect].	Scars of Mirrodin	7
Provoke	When this attacks, you may have target creature defending player controls untap and block it if able	Legions	7
Rampage	Whenever this creature becomes blocked, it gets +N/+N until end of turn for each creature blocking it beyond the first.	Legends Ice Age Mirage Time Spiral	7
Recover	When a creature is put into your graveyard from the battlefield, you may pay [cost]. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.	Ice Age	7
Retrace	You may cast this card from your graveyard by discarding a land card in addition to paying its other costs	Shadowmoor	7
Shadow	This creature can block or be blocked by only creatures with shadow.	Tempest Time Spiral	7
Snow	Snow permanents and Snow mana.	Ice Age	7
Split Second	As long as this spell is on the stack, players can’t cast spells or activate abilities that aren't mana abilities.	Time Spiral	7
Vanishing	This permanent enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.	Time Spiral	7
Echo	At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.		8
Flip cards	Cards with two card sides on the same face.		8
Madness	If you discard this card, you may cast it for its madness cost instead of putting it into your graveyard.		8
Radiance	Target creature and each other creature that shares a color with it [effect].		8
Ripple	When you cast this spell, you may reveal the top N cards of your library. You may cast any revealed cards with the same name as this spell without paying their mana costs. Put the rest on the bottom of your library.		8
Threshold	As long as seven or more cards are in your graveyard, [effect].		8
Clash	Each clashing player reveals the top card of his or her library, then puts that card on the top or bottom. A player wins if his or her card had a higher converted mana cost.		9
Flanking	Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.		9
Horsemanship	This creature can't be blocked except by creatures with horsemanship.		9
Phasing	This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.		9
Suspend	Rather than cast this card from your hand, you may pay [cost] and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.		9
Tribal	Card type allowing cards to have creature types.		9
Untap	Costs involving .		9
World	There can only be one World enchantment on the battlefield at a time.		9
Banding	Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking		10
Storm	When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.		10
Bands With Others	This creature can attack in a band as long as at least one has "bands with [factor]." Bands are blocked as a group. If at least two creatures you control, one of which has "bands with other [factor]," are blocking or being blocked by the same creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.		11