Adjudicating Spells

You Are a Creature: Unless otherwise indicated, if your spell can target a creature, the target can possibly be yourself.

Caster Awareness: You usually know when your own persistent or concentration spell ends (no matter how it ends); seeĀ Spell Durations.

Target Awareness: Unless otherwise indicated, a spell is obvious to its target only if the effect is perceivable, directly harmful, or both.

Invalid Targets: When a spell is directed at something it can't target, its power is unleashed but the target is unaffected.

Stacking Spells: The effects of the same spell cast multiple times on the same target don't combine. Instead, the most recent effect applies while the durations overlap.