Tap target creature. It doesn't untap during its controller's next untap step. Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)
Return target nonland permanent to its owner's hand. Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)
“Flight was once something we thought only a pact could grant. Nowadays, chemistry yields vapors lighter than air which power our own spells.” —Professor Michael Haldean
This spell can't be countered. Whenever Bitter Leviathan becomes the target of a spell or ability, exile it. Return it to the battlefield under your control tapped and attacking at the beginning of the declare attackers step on your next turn. It can't be blocked that combat.
Return up to two target creature cards with total mana value 4 or less from your graveyard to the battlefield.
Lettie thought to ask Barton if he was still the same person; not quite correct, as he had obviously changed. She finally asked, “Are you still my friend?”
Flying, vigilance, lifelink 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.)
Whenever Mortified Medium or another creature enters, you gain 1 life. As long as you have at least 10 life more than your starting life total, Mortified Medium gets +4/+4 and has flying.
When Militia Surgeon enters, you gain 2 life. 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.)
Vigilance 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.)
Whenever Herald of Purity is dealt damage, it deals that much damage to any target. 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.)