Indominus Rex, Alpha

As Indominus Rex, Alpha enters, discard any number of creature cards. It enters with a flying counter on it if a card discarded this way has flying. The same is true for first strike, double strike, deathtouch, hexproof, haste, indestructible, lifelink, menace, reach, trample, and vigilance.
When Indominus Rex enters, draw a card for each counter on it.

Eternal Witness

When Eternal Witness enters, you may return target card from your graveyard to your hand.

Leyline Prowler

Deathtouch, lifelink
{T}: Add one mana of any color.