Ulitharid

Extract brain: whenever this creature kills another creature, add an intelligence counter onto ulitharid.
Psionic: whenever ulitharid deals damage, add the amount of intelligence counters to the damage it deals.
Mind barrier: you may remove an intelligence counter off of ulitharid to add +0/+2 until end of turn.
{7}{t} Mind blast (deal damage equal to the amount of intelligence counters on ulitharid.)