Boromir, Warden of the Tower (Showcase Scrolls) (LTR-455) - The Lord of the Rings: Tales of Middle-earth: (Showcase)

Vigilance
Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.
Sacrifice Boromir: Creatures you control gain indestructible until end of turn. The Ring tempts you.