You need to be careful about casting cards like your commander into it since the copy is still legendary, but any creature with an enter the battlefield effect becomes twice as good
This is being corrected digitally for Murders at Karlov Manor on MTG Arena and for tabletop on printed versions after the initial Murders at Karlov Manor release. So if you opened any of the incorrect version of Fanatical Strength during the recent prerelease weekend, hold onto them
There are also plenty of land ramp spells, like Explosive VegetationExplosive Vegetation, Rampant GrowthRampant Growth, and CultivateCultivate
Penny sleeves (roughly $4 for a pack of 100) can hold up to a dozen cards, but these are most commonly used to protect a single card
Below is the complete list of cards (249 in total), sorted by rarity
Always a favorite, Pokemon simply loves to print Gardevoir cards, but they may have outdone themselves with this one