Trinidir, of All-Costs

Triple Strike (This creature deals combat damage as though it has double strike and last strike.)
{0}: Exile a card from your hand. Target colored mana symbol in the cost of target face-up card becomes that of the colors of the exiled card until end of turn. Activate this ability no more than thrice per turn.
You may cast face-up spells that are exactly three colors from anywhere.