how do you kill invincible floor cannon things?

[Doomerang]

So those things that pop up from the ground are immune to all magic and hit me for a ton of health, to the point of making a level impossible. There is no explanation on how to kill them. What do you do?

[RedBlob]

I think you can only dodge them using the purple combination.

[LONGA]

you cant kill those.just spam earth attack with summon shield or get dodge orb before the attack.

[sbeebee489]

cheers for heads up .