Guilds of Ravnica

Deafening Clarion | Sorcery | | Choose one or both — • Deafening Clarion deals 3 damage to each creature. • Creatures you control gain lifelink until end of turn. | Adam Paquette

Swiftblade Vindicator | Creature | Human Soldier | Double strike, vigilance, trample | Viktor Titov

Tajic, Legion's Edge | Legendary Creature | Human Soldier | Haste Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Prevent all noncombat damage that would be dealt to other creatures you control. {R}{W}: Tajic, Legion's Edge gains first strike until end of turn. | Anthony Palumbo

Response | Instant | | Response deals 5 damage to target attacking or blocking creature. | Daarken

Camaraderie | Sorcery | | You gain X life and draw X cards, where X is the number of creatures you control. Creatures you control get +1/+1 until end of turn. | Sidharth Chaturvedi

Emmara, Soul of the Accord | Legendary Creature | Elf Cleric | Whenever Emmara, Soul of the Accord becomes tapped, create a 1/1 white Soldier creature token with lifelink. | Mark Winters

Knight of Autumn | Creature | Dryad Knight | When Knight of Autumn enters the battlefield, choose one — • Put two +1/+1 counters on Knight of Autumn. • Destroy target artifact or enchantment. • You gain 4 life. | Ryan Pancoast

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