Sabboth lives!
My playgroup always plays with an additional rule, but it's still fun without it:
We call these Free Spells.
Drafting isn't necessary. In between rounds of regular limited, I'll pull out two stacks of roughly 60 cards from the cube and say "Here's your deck, you have infinite mana and you can play one spell per turn."
If you have time, drafting the cube is even better. 4 packs of 15 each - no sideboards.
If you have first-timers, I'd suggest doing Rochester Draft. This way you can discuss the picks, and everyone can see every card that's drafted. (Packs are drafted one at a time, face up.)
Solomon Draft is also great for 2-player drafting. (Every Pack is a Fact or Fiction)
Try it out and let me know what you think!
You can find me on discord as shark.shark if you have any questions!
HISTORYLimited Infinity (aka Type 4) is a format from the early 2000's, created by Paul Mastriano.
This stack of cards is designed to be drafted among however many players you have, then played either head-to-head, or in a multiplayer game.
The original decklist is in the link at the beginning of this primer, but it only has 230ish cards.
I calculated the ratios to an increase to 500 cards total, and removed all of the tutors (because people who aren't familiar with the cards will slow the game down DRASTICALLY when searching and reading every card).