Idris either from your hand or from the command zone by paying ({1} magic symbol) ({U} magic symbol) ({R} magic symbol) plus commander tax, if applicable.
When
Idris enters the battlefield, it triggers, exiling
Psychic Battle until
Idris leaves the battlefield.
Choose any number of targets by any method.
Idris triggers, causing each player to reveal the top card of their library and changing the target(s) of the spell or ability to
Cephalid Illusionist.
Cephalid Illusionist and
Idris trigger.
Resolve the
Cephalid Illusionist trigger, causing you to mill three cards.
Resolve the
Idris trigger, causing each player to reveal the top card of their library and changing the target(s) of the spell or ability to any other target.