Erro Amakiir, the Soulblade

Deathtouch
Whenever a creature you control does combat
damage to a player, Draw a cards equal to the
damage dealt, deal damage equal to Erro's power
to target creature, player, or planeswalker
If Erro attacks with other creatures you may pay {2} he gets +2/+2 and indestructible
{4}{u/b}: Sacrifice a creature, Erro cannot be
blocked this turn this costs {1} less for every
creature you control