Then your clue, map, myr or thopter token creating pays off when you untap Hellkite Tyrant and win the game in a cool way
Carrying on our ramping, Glittering Frost is a two generic, one green land enchantment that makes the land a snow land (letting you fit that Command Tower in your deck just fine), and also lets it tap for an additional one mana of any color
Defending player guesses whether that card's mana value is greater than the number of artifacts you control
While its true that we have seen similar cards before - like Blossoming Defense and Tamiyos Safekeeping - this one has the potential to turn your unblocked commander into a lethal threat, or skew combat in your favor when someone overcommitted their attack
Both of these cards take up a lot of life, though, and so they come paired with a health amount of lifegain in cards like Papalymo Totolymo, and Y'shtola's own ability.