The Legend of Kuruk // Avatar Kuruk | Progenitor Mimic | Mirror Box

Cards

All permanents on the battlefield (
The Legend of Kuruk // Avatar Kuruk as
Avatar Kuruk and
Progenitor Mimic as a copy of
Avatar Kuruk).

({20} magic symbol) minus ({1} magic symbol) for each creature and artifact you control each turn available available.

Activate either
Progenitor Mimic or
Avatar Kuruk by paying ({20} magic symbol) minus ({1} magic symbol) for each creature and/or artifact you can tap while activating it, causing you to take an extra turn after this one.
Move to your next turn. At the beginning of your upkeep,
Progenitor Mimic triggers, creating a token copy of
Avatar Kuruk.
Repeat using the
Avatar Kuruk token.