All standard-sized card sleeves will fit
If you don't, create a 1/1 blue Fish creature token
Keep in mind, if there is no legal target for the reflexive trigger in Minsc & Boos second loyalty ability, or if the target is illegal as the ability tries to resolve, you will not draw any cards even if the sacrificed creature was a Hamster
Its fun, it causes interesting interactions, and some effects even play well with the increased use of negative counters like finality and stun counters
Once the way is clear, Lady Tremaine, Imperious Queen herself can help you move towards your own rule, offering two lore when she quests - along with three strength and four willpower to help mop up any characters who survive her formidable purge