Streets of New Capenna

Revelation of Power | Instant | | Target creature gets +2/+2 until end of turn. If it has a counter on it, it also gains flying and lifelink until end of turn. | Eric Deschamps

Refuse to Yield | Instant | | Target creature gets +2/+7 until end of turn. Untap it. | Josh Hass

A Little Chat | Instant | | Casualty 1 (As you cast this spell, you may sacrifice a creature with power 1 or greater. When you do, copy this spell.) Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library. | Matt Stewart

Disdainful Stroke | Instant | | Counter target spell with mana value 4 or greater. | Irina Nordsol

Make Disappear | Instant | | Casualty 1 (As you cast this spell, you may sacrifice a creature with power 1 or greater. When you do, copy this spell and you may choose a new target for the copy.) Counter target spell unless its controller pays {2}. | Inka Schulz

Fake Your Own Death | Instant | | Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control and you create a Treasure token." (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | Kari Christensen

Antagonize | Instant | | Target creature gets +4/+3 until end of turn. | Gabor Szikszai

Prizefight | Instant | | Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.) Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | Deruchenko Alexander

Tainted Indulgence | Instant | | Draw two cards. Then discard a card unless there are five or more mana values among cards in your graveyard. | Inka Schulz