Overview
Collei's burst creates a Sprout Ring that applies Dendro off-field after your active character triggers reactions. She's a budget Nahida replacement for Deepwood RES shred. Low energy cost (40) makes her easy to burst frequently. Build ER and EM.
How to Play
Cast skill for Dendro application, then burst for the Sprout Ring. Swap off-field immediately, the ring triggers Dendro on reaction procs from your on-field character. She works best with fast reaction drivers like Xingqiu, Fischl, or Kuki.
Optimal Rotation
Collei Skill, Collei Burst, Xingqiu Skill/Burst, Kuki Skill/Burst, Kuki on-field. Sprout Ring procs Dendro when reactions occur. Refresh Collei burst on cooldown, 40 energy is easy to manage.
F2P Options
King's Squire is craftable in Sumeru. Deepwood Memories is farmable. Collei is free from story events, C0 with Deepwood 4pc enables Bloom teams without Nahida.
Common Mistakes
Keeping Collei on-field, she's off-field support only. Running Collei without reaction drivers, Sprout Ring needs reactions to proc. Building pure CRIT over ER/EM. Using Collei when you have Nahida, Nahida is strictly better in the same role.