GMforPowergamers
Legend
I disagree with what you're saying. A button refers to the action (in this case being an ingeniously used spell) being automatic, easy to use and simple. I'm talking about a small encounter defeating action, ingeniously used under a very particular set of circumstances - not some easily repeated recipe and very far from an "I-win" button.
Ok lets see some examples...
Here I will start...I remember a wizard useing Invisability on a door to then cast spells through it un harmed...
I remember a wizard useing the shrink item spell to shrink bolders, then drop them onto people as cloth then say the command word
I remember contingent spell heal casters becomeing little more then suciside bombers...
in 2e I remember banking lightning bolts, and crative area fireballs, and I remember there was some trick with feather fall being used as a weapon but I can't for the life of me remeber how....