The card in Lot #192 over at Goldin is rated EX 5 by collectibles grading company PSA
You already have a few ways to take advantage of that like Loot, Exuberant Explorer, so lets make this deck more consistent by improving the ramp and payoffs
Until it's worked that out, though, we still have Mentor of the Meek
On a future turn, you attack with the creature, concealing what the card is until the very last moment
Sneak Attack Creature (24) Archmage Emeritus Arni Brokenbrow Axgard Cavalry x4 Calamity Bearer Cyclone Summoner Frost Trickster x4 Mind Flayer Red Dragon x3 Teeterpeak Ambusher x4 Vortex Runner x2 Wormhole Serpent x2 Instant (4) Run Amok x4 Sorcery (5) Field Research x2 Thundering Rebuke x3 Land (27) Evolving Wilds x4 Island x11 Mountain x12 Sneak Attack is a little higgledy-piggledy when it comes to the theme
While the card got horribly pricey as a result, a reprint in Innistrad Remastered has made him a little less silly to buy