Theros

Boulderfall | Instant | | Boulderfall deals 5 damage divided as you choose among any number of targets. | Ralph Horsley

Coordinated Assault | Instant | | Up to two target creatures each get +1/+0 and gain first strike until end of turn. | John Severin Brassell

Lightning Strike | Instant | | Lightning Strike deals 3 damage to any target. | Adam Paquette

Magma Jet | Instant | | Magma Jet deals 2 damage to any target. Scry 2. | Maciej Kuciara

Spark Jolt | Instant | | Spark Jolt deals 1 damage to any target. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Mike Bierek

Titan's Strength | Instant | | Target creature gets +3/+1 until end of turn. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Karl Kopinski

Steam Augury | Instant | | Reveal the top five cards of your library and separate them into two piles. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard. | Dave Kendall

Destructive Revelry | Instant | | Destroy target artifact or enchantment. Destructive Revelry deals 2 damage to that permanent's controller. | Kev Walker