mtg cards like heroic intervention TappedOut and conquest Heroic Intervention (IT) - LaughingDragonMTG

The Secret Lair drops themselves are significantly increasing the supply of some of these cards (we have already seen the original printings of some Secret Lair reprints dropping in price, like Marrow-Gnawer), and even if Magic continues to grow, the supply of these reprints is high enough that, at least for most, it's unlikely they will explode in price in the near future

Unearth grants haste to the permanent that's returned to the battlefield (even if it's not a creature card)

Only any opponent may activate this ability and only if they see Entirely Normal Armchair

Once each turn, including on your opponents' turns, you can cast a spell with mana value X or less for free where X is the number of time counters on As Foretold