Guilds of Ravnica

Justice Strike | Instant | | Target creature deals damage to itself equal to its power. | Clint Cearley

Integrity | Instant | | Target creature gets +2/+2 until end of turn. | Ben Maier

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

Invert // Invent | Instant // Instant | | Switch the power and toughness of each of up to two target creatures until end of turn. // Search your library for an instant card and/or a sorcery card, reveal them, put them into your hand, then shuffle. | Mathias Kollros

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