Beside the wrong upgrades as it was pointed out in this bug report Trick or Treat has poorly designed upgrades
the whole weapon is useless. I specifically didn’t upgrade it fully since toad makes it even worse.
Greatest features of EoE and RoG is the gem explosion. This weapon just costs too much to cast and blocks 3 mana.
Please change the spell so it can be casted on an ally or enemy, when it casted on ally it should behave like RoG, if casted on an enemy it should behave like EoE.