mtg bloomburrow otter cards Thundertrap Trainer [Bloomburrow Promos] Bloomburrow Otter Token Creature — Otter Prowess (Whenever you cast a noncreature spell Otter - MTG Wiki

For example: Reduced Investment Risk: Knowing that Foundations cards will be legal for a longer period allows new players to invest in the products and their decks without worrying about the cards becoming obsolete too quickly

Although there are many more than just 10 that could be easily put on a list covering characters that would be perfect to have included in the game, for now here are some of the ones that would be perfect for Rise of the Floodborn

Rukarumel, Biologist The second commander out of the Sliver Swarm Commander deck, Rukarumel, Biologist is pretty much a Conspiracy on a stick, or even better, from the command zone

Given all this, I expect WotC to continue exploring doubling spells in supplemental products where Standard balance is no concern