Swingman’s Alley

At the beginning of each players draw step,
that player draws an additional card. At the
beginning of each players endstep, that
player discards a card.
{t}: Add {u/b}, you may sacrifice a creature.
If you do, add {u}{b}{r} instead.
As long as Swingman's Alley is a capital, at the
beginning of each other players upkeep. You
may look at their hand and cast a spell from it.