Activate Cormela by paying 1 and tapping it, adding that can only be spent to cast instant or sorcery spells.
Cast Time Warp by paying 3, causing you to take an extra turn after this one.
Cast Saw in Half by paying 2, destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one Cormela token into your graveyard due to the legend rule.
When the original Cormela and the token Cormela die, their abilities trigger, returning Time Warp and Saw in Half from your graveyard to your hand.
Repeat each turn.
This clever loop begins with Cormela, Glamour Thief, whose tap ability supplies the exact colored mana needed to fuel your spells. You use that mana alongside other resources to cast Time Warp for an extra turn, and then follow it up with Saw in Half to destroy the original Cormela. The legend rule promptly sends one of the resulting token copies to the graveyard, which triggers both the original and the token's death abilities to conveniently return both Time Warp and Saw in Half right back to your hand. By repeating this process on each extra turn, you ensure a continuous chain of actions that locks down the game with limitless turns.