mtg marked cards Bicycle Ultimate Plastic Deck With Marking At the beginning of your upkeep Mark Playing Cards - Nikhils

These are referred to as allied and enemy colours

As such Mystic Confluence is generally on par with the cube power level of cost to return (assuming you don't have to repeatedly Mana Leak the same target)

Feeling lucky

This is why 90 micron is the only choice for competitive and collecting players in the USA: Superior Shuffle Feel Why it Matters for MTG: Thinner sleeves often stick or bend, making shuffling difficult during crucial tournament moments

When Disorienting Choice resolves, the next opponent in turn order that controls a permanent chosen with Disorienting Choice decides whether to exile that permanent

Whenever a creature enters, untap all creatures