You could try building a version closer to midrange, which would make a transformational sideboard plan more cohesive, and that might be where the format dictates you end up
In a color that's great at aggro, and as the aggro tribe, Goblins are arguably the best tribe in today's list at building an aggro deck
Counter Intelligence, the Jeskai (white, blue, and red) deck all about proliferating counters (as the name suggests), is now under $35 almost 25% off the list price of $44.99, and essentially matching its lowest-ever price (give or take a few cents)
It will then appear in the other player's Social Hub and stay there for two days before being automatically cancelled
However, if youre a serious collector who wants the chance to pull a high-value card, a paid platform is the only way to go