Ravnica Allegiance

Gift of Strength | Instant | | Target creature gets +3/+3 and gains reach until end of turn. | Lius Lasahido

Root Snare | Instant | | Prevent all combat damage that would be dealt this turn. | Craig J Spearing

Titanic Brawl | Instant | | This spell costs {1} less to cast if it targets a creature you control with a +1/+1 counter on it. Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.) | Svetlin Velinov

Tower Defense | Instant | | Creatures you control get +0/+5 and gain reach until end of turn. | Craig J Spearing

Applied Biomancy | Instant | | Choose one or both — • Target creature gets +1/+1 until end of turn. • Return target creature to its owner's hand. | Sidharth Chaturvedi

Growth Spiral | Instant | | Draw a card. You may put a land card from your hand onto the battlefield. | Seb McKinnon

Repudiate | Instant | | Counter target activated or triggered ability. (Mana abilities can't be targeted.) | Victor Adame Minguez

Thrash | Instant | | Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. | Winona Nelson