He powers up every Spider you have, giving them the same keywords, and that applies to Spider heroes, too
So, let's say your game is entering the wee hours and you have nine mana at your disposal, so you cast Powder Ganger and pay the squad cost three times
Its keeping a powerful and staple mythic cheaper than it otherwise would be
All is not as it seems, however, as those familiar with the FF lore will remember the fate of both characters in Final Fantasy 15
Notably, Pain Distributor's first ability won't trigger for you on the turn you cast it, although it may trigger if another player casts their first spell that turn after Pain Distributor is on the battlefield
That might be Luminarch Aspirant or Innkeeper's Talent just spicing up your Cube deck with some extra power, or it could be a dedicated build-around seeking to exploit Winding Constrictor and Ezuri, Claw of Progress