mtg blue search your library for a card of Lat-Nam [Alliances] block) element.class Rules Text: Search your library

Flumph Theres an infinite combo deck in Modern with Flumph, Orcish Bowmasters, and a card that can give indestructible

(If a creature with a finality counter on it would die, exile it instead.) Enchantment Haunted One Commander creatures you own have "Whenever this creature becomes tapped, it and other creatures you control that share a creature type with it each get +2/+0 and gain undying until end of turn." (When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.) Legendary Enchantment - Background Radiant Destiny Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) As this enchantment enters, choose a creature type

For the low low cost of zero mana, Urzas Saga gives you mana, an easily scaling Construct, and a tutor effect

Others might go unreported to the masses, though people seem pretty eager to share and sell these when they open them