You can activate its eternalize ability before any player can try to exile it
Adding 20 cards to your deck seems like a massive drawback that would hamper the consistency of your deck yet Yorion got the ban hammer in several formats, and some Modern decks still tinker with 80 cards, even without the extra creature in their sideboard
But even if there may be different sub-strategies, the key cards remain the same: cheap artifact creatures like Magitek Infantry to pile on early pressure, and powerful payoffs that take advantage of your flood of artifacts such as Valkyrie Aerial Unit
Once youve built a foundation, maintaining and expanding your collection becomes progressively easier
How about Logic Knot
BT14-101 SEC Digimon Lv.6 Alternative Art WarGreymon Color Red Cost 12 DP 12000 Digivolve Cost 1 Red 4 from Lv.5 Form Mega Attribute Vaccine Type Dragonkin Card Text 1 [Special Digivolution Condition] [Digivolve] Lv.5 w/[Greymon] in name: Cost 4 [Effect] While you have a Tamer with [Tai Kamiya] in its name and your opponent has a 10000 DP or higher Digimon, any of your [Agumon] can digivolve into this card in your hand for a digivolution cost of 4, ignoring digivolution requirements
