Lethal Scheme [The Lost Caverns of Ixalan Commander]

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.)

Destroy target creature or planeswalker. Each creature that convoked Lethal Scheme connives. (Crate a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature)