For Commander, the two-cost instant shines with a target-rich environment and the general benefit of having token plus Equipment decks that go wide
Hydroid Krasis Strengths: Exiles, answers planeswalkers Weaknesses: Experimental Frenzy, Adanto Vanguard, Ripjaw Raptor Strengths: Instant-speed, answers planeswalkers Weaknesses: Rotting Regisaur, Marauding Raptor, Sanctum Seeker All three of these cards are narrow but quite powerful, which makes them great sideboard options
Its a one-time deal, though, which will likely mean limited only
Ellivere of the Wild Court
That's right, even though it's a white card, the single flashback cost makes this enchantment remover a great option for decks running Quiet Speculation and/or Wild Mongrels
As such, its quite likely that at least some of these Lands see consistent Standard play, though none in particular stands head and shoulders above the others