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Spellcasting Mishaps

Arcane Spellcasting Mishaps

When an arcane spell has been cast, it often brings with it the unintended consequences of toying with forces beyond the spellcaster's control.

Roll	Mishap Effect
1	Magical backlash! Caster takes 1d6/spell level force damage
2-3	All non-magical metal within 5' melts or takes 1 point of durability damage
4-5	Orb of darkness surrounds the party for one fight
6-7	Bizarre gravity, heavy or light
8-9	Caster emits blinding bright light to all
10-11	The spell affects the wrong target
12-13	Significant collateral damage
14-16	Caster is stunned, CON check to resist
17-19	Caster is weak, STR check to resist
20	A different, random spell is cast

I've got some different ideas here for spellcasting mishaps. –AHS

A temporary hole opens up between the second world and the mundane world
The spellcasting attracts the interest of a denizen of the second world
The spellcasting attracts the interest of a denizen of the realm of light who wants a favor; reroll the spell check but the spellcaster must complete a boon for the angel
The spellcasting attracts the interest of a spirit that only they can perceive who attacks/haunts/pesters the zealot until an appropriate exorcism is completed
The fire of the Lord falls inappropriately, consuming an ally who is a nonbeliever.