The Koopalings

Trample

As long as this card is on the battlefield,
all Koopa Kid creatures have +2/+2, and all
Artifact Creatures have +2/+2.

Whenever The Koopalings deal combat damage, create a 4/5 Clown Car artifact token creature.
When The Koopalings is destroyed, create
3 Bob-Omb artifact token creatures under opponent's control.