Progenitor Mimic | Notorious Throng | Timeless Witness

Cards

Notorious Throng in hand.
Progenitor Mimic and
Timeless Witness on the battlefield (
Progenitor Mimic as a copy of
Timeless Witness).

You control a Rogue that does not have summoning sickness and that cannot be blocked by an opponent.

Deal combat damage to an opponent using a Rogue.
Cast
Notorious Throng for its prowl cost by paying ({5} magic symbol) ({U} magic symbol) , taking an extra turn after this one.
At the beginning of your next upkeep,
Progenitor Mimic triggers, creating a token copy of
Timeless Witness.
When the token
Timeless Witness enters the battlefield, it triggers itself, returning
Notorious Throng from your graveyard to your hand.
Repeat.