Lifelink, haste

Whenever Vilteo Astreachi enters the battlefield or attacks, create two 1/1 black Bat creature tokens with flying.

Sacrifice two bats or vampires: Put a +1/+1 counter on Vilteo and another target creature.

Sacrifice six bats or vampires: Transfrom Vilteo Astreachi.

: At the start of combat on your turn, create two 1/1 black Bat creature tokens with Lifelink and Flying that are tapped and attacking.

+2: Draw two cards then discard a card.

-3: Double target creatures power and toughness until end of turn.

-6: Target player loses 15 life and you gain 15 life. Draw a card.