Vin, Ascendant Warrior

At the beginning of each upkeep, you get {e}.
Pay {e}: Vin, Ascendant Warrior gets +1/+1 until
end of turn.
Pay {e}{e}: Until end of turn, Vin, Ascendant
Warrior can't be blocked except by creatures
with flying and reach.
Pay {e}{e}{e}{e}: Target opponent reveals their
hand. You choose a nonland card from it. That
player discards that card. Activate only on your
turn.