Join Shields (Guilds of Ravnica)

{3}{G}{W}

Instant

Untap all creatures you control. They gain hexproof and indestructible until end of turn. (They can't be the targets of spells or abilities your opponents control. Damage and effects that say "destroy" don't destroy them.)

"We are the shield that never breaks, the bough that never burns, the song that can never be silenced."