Unfinity is the latest in a long line of "Un" sets in Magic: The Gathering
Distributed in packs of cigarettes or candy, they were designed to boost product sales through the allure of collecting
"Dash [cost]" means "You may cast this card by paying [cost] rather than its mana cost," "If this spell's dash cost was paid, return the permanent this spell becomes to its owner's hand at the beginning of the next end step," and "As long as this permanent's dash cost was paid, it has haste." If you choose to pay the dash cost rather than the mana cost, you're still casting the spell
Vigilance is a huge deal, and with token producers like Increasing Devotion, Beregond can knock players out quickly
Then, each turn, you mill a card and then attack a random opponent
Shiko and Narset, Unified Shiko and Narset, Unified is a great example of a strong creature with an excellent ability