While there have been several in the years since as high-end soccer cards have evolved, 2017 Leaf Q has one of the earliest
(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Sorcery Proliferate (CTRL to add secondary) Protect/Control Emerge Unscathed Target creature you control gains protection from the color of your choice until end of turn
This means if you begin building a deck for constructed play and you start with an amethyst character card you like the look of, then add an Item card from steel, you cant add an emerald card
As for Commander play, the Avatar Horror features in Winter, Misanthropic Guide and Victor, Valgavoths Seneschal, which focuses on graveyard synergies
Better still are Pendulum Normal Monsters, cards that are treated as Normal Monsters in the hand, deck, or graveyard, and Spell cards in the Spell/Trap zone
Pack Hourglasses Waiting for timers to count down can be a drag, but Pokmon TCG Pocket gives you a way to speed things up