Koralium, Ancient Awoken

Haste, Trample, Menace
{2}{b/r}{b/r}, {t}: Target player discards 2 cards at
random, then sacrifices a creature.
{2}{b}{b}{b}{r}{r}{r}: Each opponent loses 3 life, sacrifices 3 creatures, and discards 3 cards at
random. Activate this ability only during your
main phase, and only once each turn.