Community

Sphinx's Tutelage
Enchantment
Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.
5 generic mana blue mana : Draw a card, then discard a card.
"You've never considered the implications of dealing with another telepath, Jace."
Rulings (2)
Colorless is not a color, so putting two colorless cards into a graveyard won’t cause the process to repeat.
Jun 22, 2015
The process will keep repeating as long as both cards share a color and neither is a land card.
Jun 22, 2015
Legality
Formats by platform
Commander
Competitive
Digital
Prints (4)
ORI#76$1.49
Magic Origins
PIO#287—
Pioneer Masters