Defender
Tap an untapped Merfolk you control: This creature can attack this turn as though it didn't have defender.
Tap an untapped Merfolk you control: This creature gets +2/+1 until end of turn.
When this creature dies, destroy all Merfolk tapped this turn to pay for its abilities.

, : Put this creature and target creature on top of their owners' libraries, then those players shuffle their libraries.

Morph
When this creature is turned face up, counter target spell.

Flash
When this creature enters, counter target activated ability. (Mana abilities can't be targeted.)
Whenever you cast a spell, you may return this creature to its owner's hand.

, Sacrifice a Wizard: Counter target spell.
Morph

When this creature enters, you may return target creature to its owner's hand.

Flying, hexproof from activated and triggered abilities
When this creature enters, exchange control of this creature and target creature an opponent controls. If you do, you get , then sacrifice that creature unless you pay an amount of equal to its mana value.

When Volo enters, create Volo's Journal, a legendary colorless Book artifact token with hexproof and "Whenever you cast a creature spell, note one of its creature types that hasn't been noted for Volo's Journal."
, : Draw a card for each creature type noted for target permanent you control named Volo's Journal.
Choose a Background

As long as the top card of your graveyard is a creature card, this creature has the full text of that card and has the text ": Discard a card." (This creature has that card's name, mana cost, color, types, abilities, power, and toughness.)
: Discard a card.

: Add . Spend this mana only to cast an instant or sorcery spell or a kicked spell.

Flying, vigilance
Whenever you cast a spell with one or more targets, draw that many cards.

Flash
When this creature enters, counter target artifact or creature spell.

: Put this creature and each creature blocking or blocked by it on top of their owners' libraries, then those players shuffle.
: Target creature blocks this creature this turn if able.

As long as you control eight or more lands, this creature gets +1/+0 and can't be blocked.

Multikicker
Flying
When this creature enters, up to X target creatures gain flying until end of turn, where X is the number of times this creature was kicked.

Flying
Whenever one or more creatures you control with flying deal combat damage to a player, put a +1/+1 counter on each of those creatures and draw a card.

Flying
If Waildrifter would be put into a graveyard from anywhere, exile it instead.

Whenever a permanent you control becomes untapped, this creature gets +1/+1 until end of turn.

Creatures your opponents control get -1/-0.
, Discard this card: Look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.

Ninjutsu
Whenever this creature deals combat damage to a player, look at that player's hand.
: Return target Ninja you control to its owner's hand. Activate only during your turn.

This creature can't be blocked.
This creature doesn't untap during your untap step if an opponent controls two or more creatures.

: Target creature loses your choice of flying, first strike, or trample until end of turn.

Defender, flying

Defender
: Turn this creature face down.
Morph

Defender
Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step.

Defender
, : Create a 0/1 blue Plant Wall creature token with defender named Kelp.

Defender
When this creature enters, target player mills four cards.

Defender
When this creature enters, scry 1.