For 2025, it's an easy number one
If Prosper, Tome-BoundProsper, Tome-Bound is leading your deck, you'd probably want more impulse-basedimpulse-based "card draw"
Huatli and Angrath (which were used during Closed Beta before players could select their Avatar) will be available for purchase with either Gems or gold, and each of the ten guild leaders from Ravnica is also available
These two versions of Sygg can transform multiple times based on exactly what you need for a turn
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