Behold the Beyond confirmation dialog

BlueGlow

Behold the Beyond should really have a confirmation dialog, especially since Day's Undoing does. Pretty annoying to toss your whole hand when you get an unexpected cascade.

Spells in general are pretty inconsistent about this, but this is a particularly glaring one.

IM_CARLOS

Especially in event with objective like "cast x or less of y" should be an option to prohibit casting in general, not only for this card. 

On normal matches I would not use it because a lot of matches would take a lot more time if you have to check every cast.