A lot of its power comes from partner, which allows you to pair it with another legend and broaden your deck's color identity and strategy
A couple of standouts are Teferi, Master of Time who will quickly become BFFs with Sefris given a chance, and Enduring Renewal, which we can play out once we have a creature or two in play and ensure we draw straight through to our lands/noncreature interaction every turn thereafter
Wizards may hold off on printing more until subsequent visits to Bloomburrow
The six types of mana are white, blue, black, red, green, and colorless
(It's an artifact with ", Sacrifice this token: Add one mana of any color.") Whenever you attack, you may sacrifice one or more Treasures
Additional tactics from this mechanic include forced discard, targeted damage, and free spells from your opponents' decks