Emry, Lurker of the Loch + Displacer Kitten + Dark Sphere + Little Bear

Emry, Lurker of the Loch

Displacer Kitten

Dark Sphere

Little Bear

How it works

1. Activate Emry by tapping it, targeting Dark Sphere.
2. Cast Dark Sphere from your graveyard by paying 0.
3. Displacer Kitten triggers, blinking Little Bear.
4. When Little Bear enters, it triggers, untapping Emry.
5. Activate Dark Sphere by tapping and sacrificing it.
6. Repeat.

This ingenious loop relies on Emry, Lurker of the Loch to repeatedly pull Dark Sphere out of your graveyard for zero mana, fueling a noncreature spell cast that triggers Displacer Kitten. That blink targets Little Bear, whose entry trigger untaps Emry so you can repeat the process indefinitely. Meanwhile, Dark Sphere's sacrifice ability can be activated along the way, and you can even weave in Little Bear's untap utility as needed to keep the machinery humming.