Crystalline Focus

You mentally tighten your focus around your allies, increasing their performance for the time being.

Choose up to three creatures you can see within range. Whenever a target makes an attack roll or ability check before the spell ends, the target can roll a d4 and add the number rolled to the attack roll or ability check.

Alternatively, you can choose one target instead, or shift your focus to one target you chose from before - when you do, the target you choose also gains advantage on attack rolls and ability checks until the start of your next turn. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature per level of spell slot above 1st.