Madam Mim - Fox, Madam Mim - Snake, Merlin - Goat, and Merlin - Rabbit have all been meta staples
These were generally cards that were seen to be too problematic when you always had access to them from the command zone (Rofellos, Llanowar Emissary is a great example, as it could consistently come out on turn 2, or even turn 1 with a particularly spicy hand!)
That goes into the "cute" territory though, since it basically makes you skip an entire turn due to needing to tribute 3 monsters total, but it's certainly a thing that might pop up
This deck can range from aggressive to controlling, with most of the builds falling somewhere in the middle
If youre looking for the best card sleeves that offer both protection and style, Dragon Shield is a top contender in the market