Counter target spell, activated ability, or triggered ability. (Mana abilities can’t be targeted.)
Flying Carnifex Demon enters with two -1/-1 counters on it. {B}, Remove a -1/-1 counter from Carnifex Demon: Put a -1/-1 counter on each other creature. 6/6
Flying {1}{R}: Scourge of Kher Ridges deals 2 damage to each creature without flying. {5}{R}: Scourge of Kher Ridges deals 6 damage to each other creature with flying. 6/6
For each nonland permanent, choose a player at random. Then each player gains control of each permanent for which they were chosen. Untap those permanents.
{T}: Add {C}. {W}, {T}, Sacrifice a Cleric creature: You gain life equal to the sacrificed creature’s toughness. {B}, {T}, Sacrifice a Cleric creature: Target player loses life equal to the sacrificed creature’s power.
Wither (This deals damage to creatures in the form of -1/-1 counters.) At the beginning of your upkeep, put a -1/-1 counter on each nonblack creature. 5/5
Suspend 3—{1}{G}{G} Starting with you, each player may put an artifact, creature, enchantment, or land card from their hand onto the battlefield. Repeat this process until no one puts a card onto the battlefield.
Suspend 6—{W} Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players sacrifice creatures and discard cards the same way.
Devoid (This card has no color.) At the beginning of your upkeep, create a 1/1 colorless Eldrazi Scion creature token. It has “Sacrifice this creature: Add {C}.” {1}{G}, Sacrifice From Beyond: Search your library for an Eldrazi card, reveal it, put it into your hand, then shuffle.
Flash Creature cards you own that aren’t on the battlefield have flash. Each opponent can cast spells only any time they could cast a sorcery. 3/4
Whenever you’re dealt damage, you may create that many 1/1 white Soldier creature tokens. 3/3
Flying When Reiver Demon enters, if you cast it from your hand, destroy all nonartifact, nonblack creatures. They can’t be regenerated. 6/6
Flash At the beginning of each player’s draw step, that player draws an additional card.
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