Collaborative Starting Magic

Inspired by Tales of Mordhease from VILE CULT OF SHAPES.

Make a blank d20 table.  Each person adds a spell name to the table, rotating until it is complete.  Upon casting a spell, this instance's effect should be agreed upon by the player and GM within the boundaries of the spell name.  Spells usually cost a point, more if the effect is considered particularly strong by the GM.  Perhaps 1d6 per magic point if specific numbers are needed, like in Vieja Escuela.

Wizards get 1+level points.

For Priests/Clerics/Paladins: Pick a God and its thing.  Everyone else makes a spell list using the same method as above, themed entirely around that thing.  Come up with only a d12 or smaller table because it saves time and makes it much easier to strongly stick to a theme.

Clerics have 1+2/3rds (rounded down) their level in miracle points because they have plate armour, turn undead and other stuff.

Nearly the OD&D lineup, just missing the Halfling.

Also if someone writes down "Magic Dance", give them a pat on the back.