small mtg cards Tiny for standard decks Are these tiny cards legal?

As a five-drop, the Avatar Horror has decent stats, although no keywords like Balemurk

There will be a lot of cards like that on this list but they will not tend to be above the 5/10 rating mark

Chrome Mox Price range: $4.00 through $8.00 Chrome Mox Size 8.8cm x 6.3cm, Fit perfectly into KMC perfect fit sleeve

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In green, it means going big, as exemplified by Ouroboroid

My only thought is that there has to be more obnoxious permanents to cast for 5 mana youre not restricted by colour so you can just put any egregious nonsense into play pretty easily