Fëanor, Heir To Nothing

Eminenece- As long as Fëanor is in your command zone, whenever a creature you control attacks, add one mana of
it's color identity
Hexproof, Vigilance

Whenever Fëanor enters the battlefield you may sacrifice any number of creatures, Fëanor enters with two +1/+1 counters for each creature sacrificed this way
Other creatures you control have haste and trample
Whenever a creature dies, draw a card
Sacrifice a creature: add a number of any color of mana equal to sacrificed creature's mana value