Coveted Jewel There are more busted cards I can copy with Mishra, Eminent One, but if I do that once with Coveted Jewel, I draw six cards for neutral mana in a deck that usually has a Slobad, Iron Goblin effect lurking around
In blue decks that arent running green especially, this is an easy include
You can fairly reliably cast Gweena on turn two in other formats like Pioneer or Explorer, with one mana creatures like Llanowar Elves and Elvish Mystic to help ramp up to bigger cards like Craterhoof Behemoth
It does what it needs to do very well, and being able to only leave one mana up and destroy any creature is something that most decks can do comfortably
There aren't many two mana tutors that don't cost a card to use and offer this kind of flexibility, but most creatures are valuable because they are efficient rather than because they are the right tool for the job