Vin, Heir of the Survivor

When Vin enters the battlefield you gain 3 Allomancy tokens. At the beginning of each upkeep add one Allomancy token.
Spend one Allomancy token: Vin gets either flying, +2/+2, or vigilance; all until end of
turn.
{u}{b}, one Allomancy token: Target
opponent reveals their hand.