This creature can't be blocked if you've cast a historic spell this turn. (Artifacts, legendaries, and Sagas are historic.)

Whenever Kellan attacks, reveal the top card of your library. If it's a creature card with mana value 3 or less, put it into your hand. Otherwise, you may put it into your graveyard.

Haste (This creature can attack and as soon as it comes under your control.)

As an additional cost to cast this spell, you may exile any number of green cards from your hand. This spell costs less to cast for each card exiled this way.
Choose target creature with mana value less than X. Search your library for a creature card with the same name as that creature, put it onto the battlefield tapped, then shuffle.

Flying
When this creature enters, you gain 2 life and draw two cards.

You may cast spells that have a cycling ability from your graveyard.
If a card that has a cycling ability would be put into your graveyard from anywhere and it wasn't cycled, exile it instead.

Target creature gets -2/-2 until end of turn.
Void — That creature gets -10/-10 until end of turn instead if a nonland permanent left the battlefield this turn or a spell was warped this turn.

Each creature spell you cast with mana value 4 or greater has blitz. The blitz cost is equal to its mana cost. (You may choose to cast that spell for its blitz cost. If you do, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)
Blitz costs you pay cost less for each time you've cast your commander from the command zone this game.

Create a 2/5 green Treefolk Shaman creature token.
Whenever a Forest you control enters, you may return this card from your graveyard to your hand.

Whenever you cast an artifact spell, you may pay . If you do, this creature deals 1 damage to any target.

: Untap another target permanent.
: Untap two other target legendary creatures.

Flying, vigilance, ward

Destroy target creature with mana value X. If that creature dies this way, Kaervek's Purge deals damage equal to the creature's power to the creature's controller.

Coven — At the beginning of combat on your turn, if you control three or more creatures with different powers, this creature gains lifelink until end of turn.

Destroy up to one target artifact. Put a +1/+1 counter on up to one target creature.

Return target nonland permanent to its owner's hand. If you controlled that permanent, draw a card.

Pay 1 life: Prevent the next 1 damage that would be dealt to this creature this turn.

Flying
When this creature dies, each player discards a card.

Other snow and Zombie creatures you control get +1/+1.
: Return this card from your graveyard to the battlefield tapped. ( can be paid with one mana from a snow source.)

(: Add .)