It's a Goblin Hero that draws you a card. The only really downside is that it costs only coloured mana symbols, although since they are split mana costs they might as well be colourless. Is it worth it? Yeah, I think it is. Is it the best cantrip creature? Well, Baleful Strix and Elvish Visionary exist, so no. It's not bad in a UG deck though.
Cons: All coloured mana symbols