CardName: Nexus of the Multiverse
Cost: 2wwuubbrrgg
Type: Enchantment
Pow/Tgh: /
Rules Text: All {t} on lands you control are replaced with {0}.
Flavour Text:
Set/Rarity: Multiverse Design Challenge Mythic
Although better with lands like Stensia Bloodhall if you don't want to fill your decks with win conditions. That probably doesn't make a lot of difference though.
on lands you control are replaced with 
.
See Challenge # 102.
Another of my replacement theme.
Heh. Instant infinite mana of any colours you have. Similar to Mox Lotus, I guess, which perhaps suggests this is actually slightly overcosted.
Although better with lands like Stensia Bloodhall if you don't want to fill your decks with win conditions. That probably doesn't make a lot of difference though.