It probably won't have a massive support, as this is simply a "win more" card, meaning that if you already have seven mana to cast it, then you're winning anyway
You target one Beast or Beast-Warrior monster on the field, and it gains ATK equal to its DEF
Planes usually have two important parts: A main ability which can be a continuous effect, such as Tazeem in Zendikar (whose ability is that creatures can't block while this plane is active), or a triggered ability, such as Undercity Reaches from Ravnica (which allows the controller to draw a card each time one of their creatures deals combat damage to a player)
I have a few ideas for you, but most of them don't really use sagas, but I am a big fan of Zur decks and studied up on them a bit, most of the ideas are to increase the power level/offer backup plans that I think are thematically similar
V Powers Tin: Eevee V (Pokemon Battle Styles | Pokemon Cards) prices are based on the historic sales
Her Garchomp gave players one of their toughest champion battles ever, making this card extra special for those who lived through those encounters