For a low cost to play and move characters, even if it gets removed it will likely mean a character survives instead
This means you can get the ability going as soon as Choco drops, and can hold it back to keep your card advantage engine safe
Its quite easy to make modified creatures with mechanics like job select and living weapon that create tokens to attach equipment to, not to mention whites plethora of counter production
As for the best of the new creatures, O'aka, Traveling Merchant turns your excess counters into carddraw, and Maester Seymour grows creatures of your choice as you grow him
Gateway has an incredibly approachable price point and the most gentle onramp to the complexities of this game style that I have ever seen
With a big enough board state, this can go from a middling amount of lore to game-winning amounts very quickly