Changes
Added a new section: I was once confused as to why Obelisk's spell negation was not an activated trigger effect even though it had "When summoned, ..."
'''Compulsory Trigger Effects''' are effects that must [[resolve]], and are not Optional.
'''Identifying Trigger Effects''' can be done, for cards made after [[Problem-Solving Card_Text|PSCT]] change, by looking for a timing related condition, followed by a colon " ''':''' ". Some of these cards are not necessarily Trigger Effects, such as Ignition effects, often in the form "''Once per turn: You can...''" or "''During your Main Phase: You can...''" If you are not sure, you can look it up. Note that cards like [[Obelisk the Tormentor]] with post PSCT text have the word "''When''" but don't have a colon. Instead, these usually denote [[Condition Effect|conditions]].
==Example==
