Aurus, the Goldwing

This spell can't be countered.
Flash, Flying, Trample, Haste, Double Strike, Indestructible, Menace
Draw an extra card each turn. You may play
that card without paying its mana cost. If not,
discard it. If that card was discarded, target
creature gets +X/+X, where is equal to
that card's converted mana cost.