Assault Formation - The List (PLIST) New Listing choose target permanent that player

choose target permanent that player controls

where X is the mana value of a commander you own on the battlefield or in the command zone

At the beginning of your precombat main phase

Surtland Flinger deals damage equal to the sacrificed creature's power to any target

"'Invincible' is just a word

Assault Formation - The List (PLIST) New Listing choose target permanent that playerEach creature you control assigns combat damage equal to its toughness rather than its power. {G}: Target creature with defender can attack this turn as though it didn't have defender. {2}{G}: Creatures you control get +0 +1 until end of turn.