175 cards of each color
300 multicolored spells
200 artefacts
220 lands to nurture up to 4/5 colors decks

Neverending fun

This list is mostly unpowered = no Black Lotus, no Timewalk, no Timevault, no Ancestral Recall.
I tried to make it not too fast (turn 2 win): no Channel, no Fastbond, no Emrakul, no Sol Ring...
That said, there are still powerful combo cards like Oath of Druids, Show and tell, Aluren or Sneak Attack.
Still, I chose to add Magus of the Abyss over Abyss, same for Moat: because it's difficult to get rid of enchantments.