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15 multicolored rares, and Id be happy opening one of them

The third Counterspell isnt needed either, as two are enough

3 Mox Amber - Mythic Rare Retro Frame - $32.45 As far as mana rocks go, Mox Amber has a very specific activation condition

You can disturb your opponent loop by sending at the bottom of the deck (with a Hound Blaze and Borsalino7 ) a part of the RHL combo: Lucci and Hina

That kind of flexibility is why Coldsteel Heart keeps showing up on lists of the best MTG mana rocks for Commander especially in multicolor decks or builds with demanding mana costs, where hitting the right colors on time matters more than shaving a single turn of tempo