why no page 21?

@Neo987  
Disregard my statement about caster catching oneself. I suck maths. Still, the threat of collateral damage is great :P

@Background Pony #576B  
Not to mention all minor artifacts and has a chance against major (but can backfire on success) as well as Antimagic Field. In the Forgotten Realms (pre-4th edition bullshit story) it can repair swaths of dead and wild magic zones (often seen as taking the fabric of the Weave and snapping it like a sheet).
 
There was nothing “Tactical” about that nuke, ever. 80’ diameter burst of destroy/flatten all magic, including the caster unless cast by someone level 24 or higher (Range: Close (25 ft. + 5 ft./2 levels)). I was in an epic group once with an asshole DM that made the mistake of allowing one free contingency per character as a reward at one point. Everyone’s ended up being “On DM bullshittery, point-blank Widened Mordenkainen’s Disjunction”.

Referencing Mordenkainen’s Disjunction from D&D?
 
(sometimes called “Mordenkainen’s Tactical Nuke” because it can dispel all active spell effects and disenchant every magic item the target is carrying permanently)