Flying
: Target attacking or blocking creature gets +2/+2 until end of turn.

This creature enters with three +1/+1 counters on it.
Remove a +1/+1 counter from this creature: It deals 1 damage to any target.

Other Merfolk creatures you control get +1/+1.
Whenever you cast a Merfolk spell, you may tap or untap target permanent.

Menace
Whenever a creature you control attacks alone, put a +1/+1 counter on it. Then surveil X, where X is the number of counters on it. (Look at the top X cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Counter target spell. You gain 5 life.

As long as you control a Bird, this creature gets +2/+2 and has flying.

Mercenaries don't untap during their controllers' untap steps.

Create a 3/3 green Centaur creature token.
Fuse (You may cast one or both halves of this card from your hand.)

Creatures of the creature type of your choice get -3/-3 until end of turn.

: This creature gets +3/+3 until end of turn.
Persist (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.)

When this creature dies, mill three cards. (Put the top three cards of your library into your graveyard.)
Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

Flying, ward
: Exile another target creature or artifact you control. Return it to the battlefield under its owner's control at the beginning of the next end step.

Target creature gets +2/+2 until end of turn. If you control an Equipment, create a 1/1 white Human Soldier creature token.

(: Add .)

This creature enters with five +1/+1 counters on it.
Whenever a player casts a spell, remove a +1/+1 counter from this creature. If you do, create a 2/2 black Zombie creature token.

Whenever this creature enters or attacks, you lose 1 life and create a Junk token. (It's an artifact with ", Sacrifice this token: Exile the top card of your library. You may play that card this turn. Activate only as a sorcery.")
Whenever a token you control leaves the battlefield, put a +1/+1 counter on this creature.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and this turn.)

Trample
Lizard Formula — When Lizard, Connors's Curse enters, up to one other target creature loses all abilities and becomes a green Lizard creature with base power and toughness 4/4.