Mardu Castle

{t}: Add {w}, {b}, or {r}.
{w}, {t}: Create two 1/1 white Warrior creature
tokens. They gain first strike until end of turn.
{b}, {t}: Target opponent reveals their hand. You
choose a non-creature, non-land card from it.
That player discards that card.
{r}, {t}: Mardu Castle deals 4 damage to target creature.