Outside of removal, there's other powerful spells like the game-ender Exsanguinate, and the value engine Lingering Souls, both of which work well with Y'shtola's abilities due to being greater than mana value 3 when cast
Without having that as a focus, you will end up with five tokens that cannot block, and it will be difficult to finish the job that they start
Ashnod's Altar and Phyrexian Altar The altars turn your creatures into mana
Now we have a handful of creatures with the prepared mechanic who each wield a rather iconic spell from the last 30-ish years
Given the randomness of the boosters in each pre-release as well as the the structure of the tournament, Pre-Releases are pretty casual events which make them great for FF fans coming to Magic for the collaboration
This only works once per turn, but thats usually more than enough with a team of Dragons