You can even loop two of these to keep up your spell triggers
The most famous use of this was Land Tax: Stay a land behind, and you don't just have unlimited lands
In a casual format like Commander where people like to play with big, splashy cards and fun creatures, an enchantment like Humility can completely turn the game on its head with a powerful effect that nerfs most commanders and popular creature cards into oblivion
This is the Well referred to in the set name, and where the pools of six magical Inks we use to cast glimmers come from
All this points to Emrakul occupying RG Tron slots in the future, and I'm excited to try out two copies on MTGO when Moon hits online vendors soon
From 2021s Adventures in the Forgotten Realms on, cards that require you to roll a d20 have been printed in black border, and thus the mechanic became legal for a time in Standard as well as in Eternal formats