For 3 mana, you get to draw one card and another one for each other instant and sorcery spell you've cast that turn
Sure, it's only once a turn, but it's also capable of triggering on your opponents turns, making it wildly good in Commander, where you have three other people playing
Pokmon game list First Generation Pokmon Red Pokmon Green (Japan only) Pokmon Blue Pokmon Yellow: Special Pikachu Edition Second Generation Pokmon Gold and Silver Pokmon Crystal Third Generation Pokmon Ruby and Sapphire Pokmon FireRed and LeafGreen Pokmon Emerald Fourth Generation Pokmon Diamond and Pearl Pokmon Platinum Pokmon HeartGold and SoulSilver Fifth Generation Pokmon Black and White Pokmon Black 2 and White 2 Sixth Generation Pokmon X and Y Pokmon Omega Ruby and Alpha Sapphire Seventh Generation Pokmon Sun and Moon Pokmon Ultra Sun and Ultra Moon Pokmon Lets Go, Pikachu
For a single turn, its target gains immunity in battle, taking no battle damage and KOs any monster it fights, bar none
Their advantage is that they are very sneaky, but their disadvantage is their low ATK and DEF