Yawgmoth doesnt play fair
The time to grab a box or two to draft or speculate on happens every year in the late Summer as previous staples fail to find homes in Modern, Legacy, or Pioneer
Ancient Greenwarden
Various cards in the deck get better when you have a variety of card types in your graveyard, and there are various cards that help you fill your graveyard with cards in order to achieve the required four card types
Theres probably some promise in Constructed, since this serves as a cycler, a 4-mana draw-2, and a win condition with a large amount of mana, since it can target opponents and deck them out
This is potentially two recovered creatures the turn it is cast, and in a Sealed deck environment where card advantage means everything and boards are often clogged, this could make all the difference