When a Siege is defeated, it is exiled, and its owner gets to play the reverse side (which could be a Creature, Artifact, or some other MTG card type) for free at Instant speed.
Yuna has two abilities, both related to her summoning ability
Magic The Gathering cards are not strongly consistent
People playing Standard, with all the new set releases and new fancy cards, and a big rotation every 2-3 years (see whats currently in Standard here)
They Came from the Pipes is a very niche card for exactly decks that care about face-down creatures
How They Brew It Ghireds Enchantmentless Enchantress Ghired, Mirror of the Wilds by Diego Gisbert Sleep No More Good evening, and welcome, one and all, to the Her Royal Highnesss Exaltation of His Bacchanalia Theatre, Centre for All That is Artistic and Oil Change