|Expansion Set||Traitor's Reach|
|First Appearance||"Arena Night"|
The Pillar Hyren (also known as Tri-Vas) is a Hyren from the Moonland of the Underneath. He resembles a purple reptilian creature with many brown, stalagmite-like spikes along his body and two stalactite-like spikes on his chin.
Pillar Hyren appeared under the name of Tri-Vas.Edyn later discerned that Tri-Vas was the Pillar Hyren.