Magmos, molten lich lord

Partner with wrathaert, frost lich lord
(when this card comes into play, target
player searches their library for a card named wrathaert, frost lich lord )
Sacrifice a red or black creature, put X +1/+1 counters on magmos, molten lich Lord, where x is the sacrificed creatures converted mana cost
{t}{b}{r}{b/r} destroy target creature, it doesn't until during its control's until step