Incredibly cruddy card.
Banish is an alternative Blinding Light, one of the top -worst- cards in the game. Banish is very fair compared to it's nephews at 0 and 2 XP.
- Damage is sacrificed to trade the negative token effect for a positive one.
- The cost is equal to or higher than the nephew cards.
If you haven't tried them yet, Blinding Light is a real chore, they are expensive, have a game-loosing token effect and a maddeningly high chance to just whiff without any in-built +. There's also the conditional element that even if you succeed, this limited and temporary a solution to an engaged enemy might just not yield the result you want, and they're right back in the next round (Rita Young very literally gets a free copy of Blinding Light every turn, except without the action losses, free of charge and some extra mechanics too).
Banish is almost as bad as Blinding Light, it's expensive and the lack of + is crippling for a one-off effect, no chance of lost actions however is a big deal and unlike Blinding Light the moved enemy will probably not be coming right back next turn, in some cases it might even be considered to be "defeated" because it lacks a hunter keyword or isn't a threat, for example if you send the humanoid enemies in Dunwich to finished locations. The nonelite mechanic is a big bug though, preferrably I'dd have liked to see the effect be able to target Elites, for that pinch-evade, just not move or extend-exhaust them.
Banish is, in the end, better than the Blinding Light duo, but that is by no means saying much. Grab it if you like the idea of getting enemies out of the way.