card holder sleeves BCW® 3 x 4 240 pt Thick Sleeve (Pack of 100) 1/2 inch (63.5mm x 88.9mm) in size and up to 35 points in thickness Gift Card Holder Sleeve
Description
Plus, one MTG players trash is another MTG players treasure in this instance

This includes rips, tears, or content issues***

Protection & Clarity Why it Matters for MTG: Low-quality materials can be foggy, obscuring your card art (especially foils and mythics) and reducing visibility

In fact, Id argue that the only reason poison is even a viable strategy in Commander is because of the existence of proliferate as a mechanic
