Fire , Ice , Flying , and Bug are weak to Rock's hard knock
If this is your jam, might I suggest Hokori, Dust Drinker for your consideration as your transform into your local game stores supervillain
More dual lands are always good, and these are also enabled by the tapped surveil lands or shock lands, considering that those have the land types as well
Id only avoid this if I had a fairly low curve and just wanted to attack with cheap creatures, as its ultimately just another mana source if the game goes long enough

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