In the current Commander meta, Sothera operates as a flexible control piece
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Thran Dynamo continues to be one of my favorite rocks for decks without heavy devotion
It loses 500 ATK for each monster you control, until the End Phase
However, in modern play it competes with stronger, faster consistency cards like Uni-Zombie, Shiranui Solitaire, and especially Glow-Up Bloom (which directly accesses Doomking with less setup), and generic extenders like Foolish Burial or One for One often provide more efficient combo lines
Yes, you can use this card as intended and copy a powerful spell, but you can also attach it to something weaker and hope that players hold onto their counterspells as they anticipate a big move, allowing you to cast other spells instead