The top card of your library has a higher mana value than the top cards of each opponent's library.
You have a way to choose one or more targets, as well as additional legal targets for that spell or ability.
Mana Needed
({1} magic symbol) ({U} magic symbol) ({R} magic symbol) plus enough mana to pay for commander tax if applicable available.
Steps
Activate
Liquimetal Torque by tapping it, causing
Psychic Battle to become an artifact.
Cast
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.