A loop describes a set of actions that could be repeated indefinitely.
Loops need to produce something per rotation to be useful, such as:
- Infinite mana (Freed from the Real + Axebane Guardian + any defender)
- Infinite tokens (Midnight Guard + Presence of Gond)
- Infinite life
- Infinite damage
- Infinite storm count
Once a rotation is established it might be possible to take shortcuts.