At the beginning of your end step, Jon Irenicus triggers, giving control of Serendib Djinn to an opponent who controls no lands.
When Serendib Djinn's controller controls no lands, Serendib Djinn triggers, causing them to sacrifice it.
However, Serendib Djinn cannot be sacrificed due to its ability.
Serendib Djinn triggers again, creating a mandatory infinite loop that causes the game to end in a draw.

Draw the game

Jon Irenicus, Shattered One

Serendib Djinn

If needed, give control of Serendib Djinn to an opponent who controls no lands.
When Serendib Djinn's controller controls no lands, Serendib Djinn triggers, causing them to sacrifice it.
However, Serendib Djinn cannot be sacrificed due to Assault Suit.
Serendib Djinn triggers again, creating a mandatory infinite loop that causes the game to end in a draw.

Combos with "Serendib Djinn"