Much like all these effects that rely on things entering and leaving play, or indeed the Bombardment that helps you have things leave play, you only want them in a very dedicated kind of deck
This deck played around 20 enchantments to get triggers off his cast ability to make his legendary fun, like Rhystic Study and Sylvan Library, around 15 Frogs and changelings to use his ability on like Yargle, Glutton of Urborg and The Gitrog Monster and then some Voltron-ish and unblockable elements to get some punches in like Archetype of Imagination and Whispersilk Cloak

Lower Text - Promo Info THEME BOOSTER ANIMAL COLOSSEUM [EX-05] CLOSECLOSE EX5-026 SR Digimon Lv.6 Parallel Rare MetalGarurumon (X Antibody) Color Blue Purple Form Mega Attribute Data Type Cyborg/X Antibody DP 12000 Cost 12 Digivolve Cost 1 4 from Lv.5 Digivolve Cost 2 4 from Lv.5 Upper Text [Digivolve] [MetalGarurumon]: Cost 1 Blocker [When Digivolving] If [MetalGarurumon] or [X Antibody] is in this Digimon's digivolution cards, until the end of your opponent's turn, all of their Digimon gain "[When Attacking] Lose 4 memory." [When Attacking] By returning 1 Digimon card from your trash to the bottom of the deck, delete 1 of your opponent's Digimon with the same level as that card
Blastoise WOTC Presentation Galaxy Star Holo [CGC 8.5] Publication Date: 1998 Grading: CGC 8.5 Market Price: $360,000 Its not just you the text on this card looks off, and if I didnt know any better, I might just dismiss this Blastoise as a knockoff