Its completely outclassed
When you get this you do wind up with a heavier focus on creatures that can attack, or should aim to at least
For context on just how under the radar Brainstorm was, heres the eventual champion and shortlist Hall of Fame candidate, Justin Garys U/R list from that same event: Creatures (12) Lands (22) Spells (26) 2 Nevinyrral's Disk 4 Counterspell 4 Dissipate 4 Force of Will 3 Earthquake 3 Disintegrate 2 Incinerate 2 Serrated Arrows 2 Binding Grasp Sideboard Super rad deck, to be sure, but definitely could have benefited from a playset of Brainstorms
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With so few available, it makes sense that a 9.5 gem mint copy fetched $14,000 on the auction site Fanatics Collect in 2023
Archaeomancer's Map Archaeomancer's Map is a good card that searches for lands on its own