While playing as Thoth
you need to cast your Glyph of Pain
and place it at an enemy tower. You will then need two team mates who are ranged to do damage to that tower. You do not need to destroy the tower, only have two ranged team mates do damage to the tower during a single casting. It does not matter of the combination of players, i.e. Mage/Hunter, Hunters x2, or Mages x2.
To the best of my knowledge the damage that is done to the enemy tower must be a basic attack
and not an ability.
I obtained this achievement while playing assault and was given Thoth randomly. I held onto him as I knew I needed this achievement and I had two other ranged individuals on my team.
Game types that you can net this achievement on would be Assault, Clash, Conquest, Joust, and Siege.
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