Counter target activated or triggered ability. (Mana abilities can't be targeted.)

Flying
Whenever Xantid Swarm attacks, defending player can't cast spells this turn.

: Target creature gets -1/-1 until end of turn. Put a +1/+1 counter on Consumptive Goo.

Players can't cycle cards.

All morph costs cost more. (This doesn't affect the cost to cast creature spells face down.)

At the beginning of each player's upkeep, Sulfuric Vortex deals 2 damage to that player.
If a player would gain life, that player gains no life instead.

Whenever a creature dies, tap all untapped creatures that share a creature type with it or untap all tapped creatures that share a creature type with it.

Whenever Raven Guild Master deals combat damage to a player, that player exiles the top ten cards of their library.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Create X 4/4 white Angel creature tokens with flying.
Cycling (, Discard this card: Draw a card.)
When you cycle Decree of Justice, you may pay . If you do, create X 1/1 white Soldier creature tokens.

, : Put a trap counter on target land you control.
Sacrifice a land with a trap counter on it: Trap Digger deals 3 damage to target attacking creature without flying.

Reveal the first card you draw each turn. Whenever you reveal a creature card this way, draw a card.

Flying
Prevent all damage that would be dealt to Dawn Elemental.

If damage would be dealt to you, put that many depletion counters on Force Bubble instead.
When there are four or more depletion counters on Force Bubble, sacrifice it.
At the beginning of each end step, remove all depletion counters from Force Bubble.

Defender (This creature can't attack.)
Flying
When Ageless Sentinels blocks, it becomes a Bird Giant, and it loses defender. (It's no longer a Wall. This effect lasts indefinitely.)

Players don't lose unspent mana as steps and phases end.

Whenever a creature enters, destroy it.
: Destroy Lethal Vapors. You skip your next turn. Any player may activate this ability.

Whenever a player casts a spell, you may put a +1/+1 counter on Forgotten Ancient.
At the beginning of your upkeep, you may move any number of +1/+1 counters from Forgotten Ancient onto other creatures.

Forests you control are 1/1 green Elf creatures that are still lands.
, Sacrifice an Elf: Target creature gets +3/+3 until end of turn.

At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature of their choice.
At the beginning of the end step, if no creatures are on the battlefield, sacrifice Call to the Grave.

Target player loses life equal to the damage already dealt to that player this turn.

: Turn Mischievous Quanar face down.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Mischievous Quanar is turned face up, copy target instant or sorcery spell. You may choose new targets for that copy.

Flying
Whenever a creature dealt damage by Soul Collector this turn dies, return that card to the battlefield under your control.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle.
: Gain control of target Sliver. (This effect lasts indefinitely.)

When Parallel Thoughts enters, search your library for seven cards, exile them in a face-down pile, and shuffle that pile. Then shuffle your library.
If you would draw a card, you may instead put the top card of the pile you exiled into your hand.

When Siege-Gang Commander enters, create three 1/1 red Goblin creature tokens.
, Sacrifice a Goblin: Siege-Gang Commander deals 2 damage to any target.

Whenever Nefashu attacks, up to five target creatures each get -1/-1 until end of turn.

Haste
At the beginning of each player's upkeep, that player untaps Karona, False God and gains control of it.
Whenever Karona attacks, creatures of the creature type of your choice get +3/+3 until end of turn.

Whenever a spell or ability is put onto the stack, if it has a single target, reselect its target at random. (Select from among all legal targets.)

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Root Elemental is turned face up, you may put a creature card from your hand onto the battlefield.

Shuffle your library. Then exile the top card of your library. Until end of turn, you may play that card without paying its mana cost.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

When Day of the Dragons enters, exile all creatures you control. Then create that many 5/5 red Dragon creature tokens with flying.
When Day of the Dragons leaves the battlefield, sacrifice all Dragons you control. Then return the exiled cards to the battlefield under your control.

Ancient Ooze's power and toughness are each equal to the total mana value of other creatures you control.

Flying
: Return Eternal Dragon from your graveyard to your hand. Activate only during your upkeep.
Plainscycling (, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

Any number of target players each discard a number of cards equal to the highest mana value among permanents you control.

Flying
Whenever this creature deals combat damage to a player, each player discards their hand, then draws seven cards.

At the beginning of your upkeep, Form of the Dragon deals 5 damage to any target.
At the beginning of each end step, your life total becomes 5.
Creatures without flying can't attack you.