Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."
Lifelink, hexproof from instantsAs long as your life total is greater than your starting life total, Elenda gets +1/+1 and has menace. Elenda gets an additional +5/+5 as long as your life total is at least 10 greater than your starting life total.
Flash (You may cast this spell any time you could cast an instant.)FlyingWhenever this creature attacks, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to that card's mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
Vigilance, prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)Whenever this creature deals combat damage to a player, put that many incubation counters on it.Remove three incubation counters from this creature: Create a 2/2 blue Drake creature token with flying.
: Exile target creature card from a graveyard that was put there this turn. Create a token that's a copy of it, except it's a Nightmare in addition to its other types. Then exile all other Nightmare tokens you control.
FlyingWhenever this creature attacks, you may sacrifice another creature. If you do, put a +1/+1 counter on this creature.Whenever another nontoken creature dies, draw a card.