It effectively shields your cards from scratches, water damage, and other potential hazards, keeping them in pristine condition
Threats like Rampaging Baloths and Kalonian Twingrove allow us to go wide while also avoiding too much commitment to the board in the face of a potential board wipe, but Heroic Intervention and Withstand Death are pretty effective at dealing with that
Card Group 5 is Archosaur which we need at least 1 copy of in the deck as well, so the Max is 1
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This is amazing for giving your Numbers monsters more fuel to activate their abilities: for example, you could attach this card as materials to Number 17: Leviathan Dragon and have its attack stat go all the way up to 4000
Any card with cascade also exiles cards individually, turning The War Doctor into a literal bomb on the battlefield