Here is the full list of all 10 Risnuch achievements.
REACH TO 5000 POWER
REACH TO 10000 POWER
REACH TO 50000 POWER
REACH TO 100000 POWER
Enchant your first legendary sword
GO TO GRAVE
REACH TO THIRD WAVE IN GRAVE
REACH TO FIFTH WAVE IN GRAVE
REACH TO TENTH WAVE IN GRAVE
WIN IN ARENA