Weaver of Harmony + Bear Umbra + Maze of Ith

Weaver of Harmony

Bear Umbra

Maze of Ith

How it works

1. Declare Weaver of Harmony as an attacker, triggering its ability.
2. Holding priority, activate any number of mana-producing lands you control by tapping them, adding 1.
3. Activate Maze of Ith by tapping it, untapping Weaver of Hamony.
4. Activate Weaver of Harmony by paying and tapping it, copying the Weaver of Harmony trigger from step 1.
5. Resolve the copy of the Weaver of Harmony trigger, untapping all lands you control.
6. Repeat from step 2.