pokemon go cards radiant charizard s10b 011/071 Japanese CGC 10 Having been authenticated and graded Radiant Charizard 011/071 Pokemon GO

Or you hit Lathril, Blade of the Elves after your opponent has cast their Kindred Dominance

There is something flavorful about a powerful, mystical relic that granted you some power you've never even seen before

There are also plenty of counter synergies to abuse with the free counters if gives as well, from Fertilid to Tayam Luminous Enigma

How about artifacts in general, like an Equipment deck

One such card is The Gitrog, Ravenous Ride - a 6/5 that allows players to sacrifice a saddled creature whenever it attacks, which then enables the player to draw a number of cards equal to the sacrificed creatures power, as well as play that number of land cards from their hand onto the battlefield, tapped

Now that I think about it though, generating 2 mana, casting a big creature, and then having even more mana to spend doesn't sound bad for a creature heavy ramp deck