This is the New Mage Card Raving Grimoire. It’s not super-powerful at first glance but you can never write any cards off before trying them and seeing what new synergies there are.
Being a 1 mana 1/1 you would have to assume it’s best played in an aggressive build like Tempo Mage. However, once again you are leaving your fate up to RNG and it depends on what spell you get to how good you feel about including this card in your deck.
It’s a downgrade for situations where a random 1-drop can appear. A 1/1 is among the lowest base stats so it’s going to be a disappointment from that perspective.