chimera card sleeves Sleeve Kings: Standard USA (57.5x89mm) SleeveKings are guaranteeing their sleeve will not split Mayday Games 7044 Clear Sleeves

Generally speaking, Magical Stone Excavation is a bad card because you're trading 3 cards (itself, and the two you discard) for just 1 card back, costing you 2 cards in the process, although this isn't true for all cards since the card One for One (quite ironically, a 2 for 1) will always generate advantage, despite technically always costing you a card since you could potentially summon something like Glow-Up Bulb which can recur from the grave at no cost your hand or field, effectively replacing the card you discarded for One for One while also (going back to point 1) progressing your gamestate by helping you make easy Synchros

For Cats, we already have Arahbo, Roar of the World, and while it's a great commander, Arahbo more supports a Go Tall strategy whereas a lot of the best Cat Tribal cards promote Go Wide (Feline Sovereign), which Rin and Seri support better

Lugia VSTAR - worth $4 ungraded 2

While your opponents make what they think are fair trades, the second triggered ability turns you on to treasure and card advantage

Shiranui Splendidsaga [ATK 2300] 2+ Zombie monsters Synchro Monsters you control cannot be destroyed by card effects, also FIRE monsters you control cannot be destroyed by battle