Altar of the Goyf (M3C 282)

Kindred Artifact — Lhurgoyf • Mana cost: {5} • Modern Horizons 3 Commander • Uncommon

Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of card types among cards in all graveyards.
Lhurgoyf creatures you control have trample.

"What dies grows the [illegible]"
—Clawed-out statue inscription

Illustrated by Yeong-Hao Han.