Grymwyr Magician

{u}{t}: Untap target creature, that creature gets +1/+1 until end of turn.
Relentless {x} (When you would normallt tap Grymwyr Magician to attack or pay for activated ability of Grymwyr Magician, you may pay {x} if you do, do not tap Grymwyr magician)
{x} is {1} plus {1} for each time Grymwyr has used relentless this turn.