Son Goku

Flying, Flash
Goku enters with +1/+1 counters equal to the
amount of mana spent to cast. During an
opponent's turn, if a creature you control dies,
this card costs 1{u}{r} less. If you do, Goku enters
with four additional +1/+1 counters.
Zenkai Boast — If this Saiyan would take damage, instead remove that many +1/+1 counters. at the end
of the phase put twice that many on.