Clement, the Worrywort + Intruder Alarm + Stickytongue Sentinel

Clement, the Worrywort

Intruder Alarm

Stickytongue Sentinel

How it works

1. Activate any number of creatures you control by tapping them, adding at least enough mana to cast Stickytongue Sentinel.
2. Cast Stickytongue Sentinel by paying its mana cost.
3. When Stickytongue Sentinel enters the battlefield, it, Clement and Intruder Alarm trigger.
4. Resolve the Clement trigger, returning nothing to your hand.
5. Resolve the Stickytongue Sentinel trigger, returning the other creature with greater mana value from the battlefield to your hand.
6. Resolve the Intruder Alarm trigger, untapping all creatures.
7. Activate any number of creatures you control by tapping them, adding at least enough mana to cast the creature returned to your hand.
8. Cast the creature by paying its mana cost.
9. When the creature enters the battlefield, Clement and Intruder Alarm trigger.
10. Resolve the Clement trigger, returning Stickytongue Sentinel from the battlefield to your hand.
11. Resolve the Intruder Alarm trigger, untapping all creatures.
12. Repeat.