It accelerates your mana while filling the graveyard, setting up future plays
Especially for a 20-card deck, drawing 2 cards is extremely reliable and a must if you want to get to all the cards you need in time
It does require the creatures to be nontoken, but white has a decent amount of recursion, especially for cheap creatures with Sun Titan, Sevinnes Reclamation, and Raise the Past
But to play it, the symbols in the upper right tell me that I need to have one mountain land card out and one other land of any other type
The mechanic itself will be largely forgotten about before long, except for those decks that are able to make use of them the best
(There is a level 10 "Flower Cardian Gokou" for Synchro Monsters.) In addition to being able to activate the Continuous Spell "Future Fusion" and his spell card "Dragon's Mirror", Special Summon is also possible