Kicker and/or (You may pay an additional and/or as you cast this spell.)
If this creature was kicked with its kicker, it enters with two +1/+1 counters on it and with first strike.
If this creature was kicked with its kicker, it enters with a +1/+1 counter on it and with trample.

Infect
This creature can't attack unless defending player is poisoned.

Partner with Chakram Slinger
Whenever you cast a spell during your turn, untap target creature.

Whenever this creature becomes blocked, you may draw a card.

You may have Chameleon enter as a copy of a creature you control, except his name is Chameleon, Master of Disguise.
Mayhem

When this creature enters, you may draw cards equal to its power. If you do, discard two cards.
Eternalize

Flying
This creature gets +3/+3 as long as you control a creature with three or more level counters on it.

As an additional cost to cast this spell, behold a Merfolk and exile it.
Whenever this creature enters or becomes tapped, tap up to one target creature and put a stun counter on it.
When this creature leaves the battlefield, return the exiled card to its owner's hand.

Flying
Whenever you cast an Adventure spell, you may copy it. You may choose new targets for the copy.

You may reveal this card from your opening hand. If you do, at the beginning of the first upkeep, each opponent mills seven cards.
Flying
When this creature enters, you may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost.

Spells your opponents cast that target Charix cost more to cast.
: Charix gets +X/-X until end of turn, where X is the number of Islands you control.

Flying
Whenever this creature attacks, target creature you control gains flying until end of turn.

Whenever you draw a card, put a +1/+1 counter on this creature.
When this creature dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on this creature.

If Cheatyface is in your hand, you may sneak Cheatyface onto the battlefield. If an opponent catches you right away, that player may exile Cheatyface.
Flying

Whenever a 6 is rolled on a six-sided die, put a +1/+1 counter on each Bird. (You may roll dice only when instructed to.)
Tap an untapped Bird you control: Roll a six-sided die. (Like now.)

Artifact spells you cast have convoke.

Seek out — Whenever you draw your second card each turn, double the number of each kind of counter on target artifact or creature you control.

Flying
When this creature enters, tap target creature an opponent controls. It doesn't untap during its controller's next untap step.

: Monstrosity 2. ( can be paid with one mana from a snow permanent.)
As long as this creature is monstrous, it has flying.

Flying
At the beginning of your upkeep, sacrifice Chisei unless you remove a counter from a permanent you control.

Flying
Heroic — Whenever you cast a spell that targets this creature, scry 1.

Flying
Whenever you cast a noncreature spell, incubate X, where X is that spell's mana value.

Affinity for artifacts
Flying
When this creature enters, reveal the top three cards of your library. Put all artifact cards revealed this way into your hand and the rest into your graveyard.

Morph
When this creature is turned face up, you may exchange control of target creature you control and target creature an opponent controls.

: This creature gets +3/+3 until end of turn. You skip your next turn. Activate only once each turn.

Flying
Vanishing 3
When this creature dies, if it had no time counters on it, create two tokens that are copies of it.

Flying
This creature can block only creatures with flying.
: Draw two cards, then discard a card.

Flying
When this creature dies, surveil 2.

: Draw a card, then discard a card. If a creature card is discarded this way, untap this creature, then transform it.

As Clam Session enters, choose a word.
At the beginning of your upkeep, you may sing at least six words of a song, at least one of which is the chosen word. If you don't, sacrifice Clam Session. You can't repeat a song.