Dimension Shift and Boost

Dimension Shifts and Boosts are the first prestige layer in the game. They are put together because dimension boosting will eventually replace dimension shifting.

Dimension Shift
This resets your progress so far, but unlocks a new dimension for your next run. Each one requires 2 of the highest dimension you have unlocked, starting at fourth and going all the way up to eighth. Purchasing certain infinity upgrades will let you skip dimension shifts in normal runs, and completing the achievement "Zero Deaths" allows you to skip them in challenges as well. You also gain a 2x multiplier to all dimensions.

Dimension Boost
This resets your game like a dimension shift, but you don't unlock a new dimension. Instead, you get a 2x multiplier to all dimensions on your next run (can be increased with an upgrade later). The first one costs 2 ninth dimensions, and each subsequent one costs 2 more ninth dimensions (this scaling can also be decreased with an upgrade).