For starters, I was just thinking about this concept for a little while whilst searching for time related stuff, so if it feels rough, I'd appreciate some tips, if it helps to make you want to give some, consider me homeless.
The Peculiar Clocktower
Spell | Field
During each phase of your turn, you can choose to advance the turn count by 5.
If the turn count reaches 0; Lose the Duel.
If this card leaves the field by an effect not pertaining to a "Timeless" or "Peculiar" card; reduce the turn count until it is 1.
This card gains the following effects by the amount of turns passed:
.20: Once per turn, you can special summon one "Timeless" monster to your side of the field from your hand or graveyard, but if you do; reduce the turn count by 10.
.30: Whenever a "Timeless" monster leaves the field; advance the turn count by 5.
.50: Up to twice per turn, you can decrease the turn count by any amount from 1 to 12; special summon a monster with the same amount of levels as the amount of turns decresed from either player's graveyards to your side of the field.