Do the following to earn 10 mana:

1. Bet exactly 1 mana on NO on the linked market.

2. Promise not to make any further trades on the linked market.

3. Comment here saying you did steps 1 and 2.

https://manifold.markets/ct17/will-the-medians-of-the-bids-on-thi?r=cm9iZXJ0