Technically speaking, it's legal to play with a deck of more than 60 cards, but at all times your deck must be at least 60 cards and your sideboard must be at most 15 cards
Main Collectable Card Games Magic: The Gathering Season of Renewal Season of Renewal Casting Cost: Card Type: Instant Card Text: Choose one or both - Return target creature card from your graveyard to your hand
Using this to buff your creatures and complete Pyromancer's Ascension (Dragon's Approach anyone?) and Luminarch Ascension looks powerful, though building around quest counters seems more niche than good
It wasnt just the original series that was guilty of this, either
Secrets just recently returned at the time, and with 15 total in the set, pulling a Necroface is tough, to say the least
I went with Phyrexians, but you could go heavier into artifacts, +1/+1 counters, or even planeswalkers