Tomb of Koralium

{t}: Add {b} or {r}.
{1}, {t}: Add {b}{r}.
{5}, {t}: Put 5 tomb counters on Tomb
of Koralium.
{6}{b/r}{b/r}, remove 15 tomb counters
from Tomb of Koralium: Create a 15/15
red Golem creature token with trample, or
Tomb of Koralium deals 15 damage to any
target, or search your library for 5 cards, put
them into your hand, then shuffle your deck.