Giant Breeder

At the beginning of your upkeep, for each Stomper creature you control, pay {r}{g}{g} or sacrifice Giant Breeder and that creature, then
tap all lands you control and each Stomper creature you control deals damage equal to its power to you. Sacrifice those Stompers.
{4}{r}{g}{g}, {t}: Create an 8/8 green Stomper creature token with trample and "You cannot control more than four creatures named
Stomper."