Mac and Kark, Builder-Breakers

Haste
{2}{r}{t} create a ingot token with "the next time you would play an artifact sacrifice this token that artifact costs {2} less"
{2}{r}{t} create a dynamite token with "this token enters with a fuse counter on it, at the beginning of your upkeep remove a fuse counter from this token destroy target artifact or deal 5 damage to a creature"