IFN Challenge - Yuka Stage 4 IFN Challenge - Yuka Stage 4 has no description yet. Chain Preview IFN Challenge - Yuka Stage 2 →IFN Challenge - Yuka Stage 3 → IFN Challenge - Yuka Stage 4 → IFN Challenge - Yuka Stage 5→ IFN Killpoint Challenge - Yuka Stage 6 Full Graph Steps & Objectives Step 1 Kill 4 Yuka • Kill 4 creatures Dependencies Prerequisites IFN Challenge - Yuka Stage 3 Unlocks IFN Challenge - Yuka Stage 5