Charging Terror

Trample, haste, radiate, rad-casting (Each radiation counter you pay while casting this spell pays for {1}. If this resolves as a permanent, it enters the battlefield with a radiation counter on it, for each radiation counter you spent to cast it.)
Charging Terror gets +1/+0 for each radiation counter on it.
{4}{b/g}{b/g}: Return Charging Terror from your graveyard to your hand.