As in, it has been a part of Magic since the original set, Alpha
Cards like Earthen Ally and Invasion Reinforcements help fill out our curve, Ty Lee, Chi Blocker gives us some flash removal, and Appa, Steadfast Guardian is insane, as a way to protect our team with airbending and make Ally tokens
The question is, can you stay competitive while piling up your graveyard
There is no holo guarantee
Vallon, the Super Psy Skyblaster X DARK Rank 5 [ Psychic / XyzEffect ] ATK 2500 DEF 2200 2 Level 5 monsters During the Main Phase (Quick Effect): You can detach 1 material from this card, then target 1 face-up monster your opponent controls
(1) When this card resolves, you can add 1 Recipe card from your Deck or GY to your hand