Guilds of Ravnica

Join Shields | 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.) | Winona Nelson

March of the Multitudes | Instant | | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Create X 1/1 white Soldier creature tokens with lifelink. | Zack Stella

Assure | Instant | | Put a +1/+1 counter on target creature. That creature gains indestructible until end of turn. | Jason A. Engle

Assassin's Trophy | Instant | | Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle. | Seb McKinnon

Status | Instant | | Target creature gets +1/+1 and gains deathtouch until end of turn. | Ben Wootten