Direct answer
Summoning and progression checklist; see the linked creature for combat attributes. Optional: Next action: Mystical Altar Go to the location: Eikthyr Defeat the target: Eikthyr Possible drops: Hard Antler / Eikthyr Trophy
Eikthyr · Challenge checklist

Result
Optional: Next action: Mystical Altar → Defeat the target: Eikthyr
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