At the beginning of your upkeep, Thopter Spy Network's first ability triggers, creating a 1/1 Thopter artifact creature token.
At the beginning of your end step, Conjurer's Closet triggers, blinking Myr Battlesphere.
When Myr Battlesphere enters the battlefield, its first ability triggers, creating four 1/1 Myr artifact creature tokens.
Activate Time Sieve by tapping it, sacrificing the Thopter and the four Myrs, causing you to take an extra turn after this one.
Repeat each turn.

Infinite turns

Lock

Time Sieve

Myr Battlesphere

Conjurer's Closet

Thopter Spy Network

At the beginning of your upkeep, Thopter Spy Network's first ability triggers, creating a 1/1 Thopter artifact creature token.
Deal combat damage using Obeka.
Obeka triggers, causing you to get at least four upkeep steps after this phase.
Repeat step 1 during each of the additional upkeep steps.
Activate Time Sieve by tapping it and sacrificing five Thopters, causing you to take an extra turn after this one.
Repeat each turn.

Obeka, Splitter of Seconds

At the beginning of your upkeep, Thopter Spy Network's first ability triggers, creating a 1/1 Thopter artifact creature token.
At the beginning of your end step, Teleportation Circle triggers, blinking Myr Battlesphere.
When Myr Battlesphere enters the battlefield, its first ability triggers, creating four 1/1 Myr artifact creature tokens.
Activate Time Sieve by tapping it, sacrificing the Thopter and the four Myrs, causing you to take an extra turn after this one.
Repeat each turn.

Teleportation Circle

At the beginning of your upkeep, Stasis and Thopter Spy Network's first ability trigger.
Resolve the Thopter Spy Network trigger, creating a 1/1 Thopter artifact creature token.
Activate Urza's first ability by tapping the Thopter, adding {U}.
Resolve the Stasis trigger, causing you to pay {U}.
Repeat during each of your turns.
As long as Stasis is on the battlefield, players skip their untap steps.

Players skip their untap steps

Stasis

Urza, Lord High Artificer

At the beginning of your upkeep, Thopter Spy Network's first ability triggers, creating a 1/1 Thopter artifact creature token.
At the beginning of your end step, Soulherder's second ability triggers, blinking Myr Battlesphere.
When Myr Battlesphere enters the battlefield, it and Soulherder's first abilities trigger.
Resolve the Soulherder trigger, putting a +1/+1 counter on it.
Resolve the Myr Battlesphere trigger, creating four 1/1 Myr artifact creature tokens.
Activate Time Sieve by tapping it, sacrificing the Thopter and the four Myrs, causing you to take an extra turn after this one.
Repeat each turn.

Soulherder

At the beginning of your upkeep, Thopter Spy Network triggers, creating an artifact token.
Activate Shuri by paying {1} and tapping it, causing the artifact token to become a copy of Mindslaver that isn't legendary.
Activate the artifact token by paying {4}, tapping and sacrificing it, causing you to gain control of target opponent during their next turn.
Repeat during each of your turns.

You control one opponent on each of their turns

Shuri, Wakandan Inventor

Mindslaver

At the beginning of your upkeep, Thopter Spy Network's first ability triggers, creating a 1/1 Thopter artifact creature token.
At the beginning of your end step, Thassa triggers, blinking Myr Battlesphere.
When Myr Battlesphere enters the battlefield, its first ability triggers, creating four 1/1 Myr artifact creature tokens.
Activate Time Sieve by tapping it, sacrificing the Thopter and the four Myrs, causing you to take an extra turn after this one.
Repeat each turn.

Combos with "Thopter Spy Network"