It can protect anything be it Enchantment, Creature or even Planeswalker (though it wont stop combat damage)
Thats not where Gaston, Intellectual Powerhouses cleverness stops, either
There are a number of ways you can keep your commander safe, but no protection is perfect
Traveling Chocobo (Borderless) (Neon Ink Blue) Printing Foil Condition Near Mint (NM) Rarity Mythic Rare Number 551c Market Price $2,014.12 The Traveling Chocobo cards quickly became one of the most sought-after card types in the Final Fantasy x Magic: The Gathering set, thanks mostly to their different color variants, but also their utility in-game
Indominus Rex // Polyraptor (Foil) Jurassic World: Life Breaks Free Secret Lair Drop Market Price: $32.54 While the mechanically unique Indominus Rex from Lost Caverns might be worth more, the version that serves as a reskinned Polyraptor is also worth a pretty penny
Your maximum hand size is eight