Orvar, the All-Form | Palinchron | Mind Games

Cards

You control up to seven lands that can tap to produce at least ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) .

Activate up to seven lands you control by tapping them, adding at least ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Cast
Mind Games with buyback by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , targeting
Palinchron.
Orvar's first ability triggers, creating a token copy of
Palinchron.
When the
Palinchron token enters the battlefield, it triggers, untapping up to seven lands.
Resolve
Mind Games, returning it to your hand.
Repeat.
If you control up to seven lands that can tap to produce at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) , this combo nets infinite mana, which you can then target any creatures you control in step 2 to create infinite token copies of them.