the front side of Sage of Hours
the back of a classic MtG card
the front side of Big Mother Mouser
the back of a classic MtG card
the front side of Resourceful Defense
the back of a classic MtG card

Color Identity: W, U

Initial Card State

  1.  All permanents on the battlefield (Big Mother Mouser without summoning sickness).

Notable Prerequisites

  1. Big Mother Mouser has five or more +1/+1 counters on it.
  2. An opponent cannot block and kill Big Mother Mouser.

Mana Needed

  1. ({4} magic symbol)  ({W} magic symbol)   each turn available.

Steps

  1. Declare Big Mother Mouser as an attacker, triggering its ability, doubling the +1/+1 counters on it.
  2. Activate Resourceful Defense by paying ({4} magic symbol)  ({W} magic symbol)  , moving five +1/+1 counters from Big Mother Mouser to Sage of Hours.
  3. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
  4. Repeat each turn.

Notes

  1. If Big Mother Mouser starts with more than five +1/+1 counters, each turn will cause Big Mother Mouser to get more counters. You can then remove more counters to place them on Sage of Hours, which can allow you to gain multiple turns at once and save mana.

Results

  1. Infinite turns.

Metadata

  1. This combo produces a lock.
  2. In 1 deck according to EDHREC.
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