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Message: <blockquote data-quote="Spatzimaus" data-source="post: 925983" data-attributes="member: 3051">By the core rules, counterspelling stinks.Add in Feats from other sources (for example, Reactive Counterspell) and it now becomes more workable.One easy change we use IMC is related to an older thread: Spell Chains.  That is, it's clear all nine Summon Monster spells are in one chain; they're all upgrades of each other.  So, you should be able to counterspell a spell in this chain with another spell from the same chain of equal or higher level.Likewise, Alter Self, Polymorph Self, and Shapechange are in the same chain.(As a Feat, maybe you could let someone use a lesser spell in the chain to counter a greater one, with a caster level check)We also use the same rules for item prerequisites.  If a flaming sword asks for Fireball, then you can also use DB Fireball or Meteor Swarm, since they're upgrades of the basic Fireball.</blockquote>