Though I was thoroughly impressed by the care that went into the Final Fantasy set (it is clearly a labor of love) I do not think making the Universes Beyond brand tournament legal represented a healthy impulse
In addition to these we also have ability lock such as Wobbufett, G
Faithless Looting is one of the best ways to rip through your deck and load your graveyard, Vault of the Archangel is a great utility land that offers some impressive keywords, and Gravecrawler is one of the best Zombies ever printed as a result of its ability to continuously come back to the graveyard
Unforunately, that ability means that the owner of that Creature has to pay one mana in their upkeep to keep it, otherwise they have to sacrifice it
Rarity Rare items often attract a good sum of money, and the original Pokmon trading cards are no exception
And sure, if your opponent kills the Cube theyre going to get back the creature -- but, given enough time you can dissolve that creature, which will make it so they wont get it back