A work in progress.

You have to draft the lands! 5 packs of 15 cards, but you don't get to add basic lands after the draft.

Themes:
<Basic Land Type> Matters
Basic Lands Matter
Domain
Snow
Artifacts
Guildgates
Deserts
Colorless Mana Matters

750 Card Cube = 450 nonlands, 150 nonbasic lands, 150 basic lands
(750 fits 10 players. Consider expanding to 900 for 12 players)

450 nonlands
56 Each Color (280 Total) 170 Multicolor (~15 per allied guild, ~10 per enemy guild, 4 per shard, 3 per wedge, ~6 rainbow)
50 Colorless (25 creatures & 25 noncreatures)

150 nonbasic lands (10 cycles of 10 lands for each guild, 50 ~utility lands)
(Have basic land type)
OG Duals
Shock Lands
Battle Lands
Kaldheim Snow Duals
Bicycle Lands / Triomes (Note: cycles incomplete)

(Do not have basic land type)
Check Lands
Reveal Lands
Pain Lands
Guild Gates
Zendikar Manlands

150 Basic Lands
24 of each normal basic land
6 snow lands of each basic land type (unique art for each)

5 Packs
Seeded 15 card pack = 3 basic lands, 3 nonbasic lands, 9 nonlands