Darklord Ixchel allows you to set up your graveyard by sending it with another Darklord card to your graveyard and drawing 2 cards
Theres also a cheeky infinite mana combo with it featuring Devoted Druid and Exchange of Words
Like most Magic: The Gathering cards, the value of Kenrith, the Returned King depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy: Through the Ages)
Anything I missed or that you still have questions about
Nibiru, the Primal Being X LIGHT Level 11 [ Rock / Effect ] ATK 3000 DEF 600 During the Main Phase, if your opponent Normal or Special Summoned 5 or more monsters this turn (Quick Effect): You can Tribute as many face-up monsters on the field as possible, and if you do, Special Summon this card from your hand, then Special Summon 1 "Primal Being Token" (Rock/LIGHT/Level 11/ATK ?/DEF ?) to your opponent's field (this Token's ATK/DEF become the combined original ATK/DEF of the Tributed monsters)
The actual Pokmon, items, and support cards included in the set are still unknown
