In Search of Greatness is a rare Enchantment card from Kaldheim Promos (PKHM), collector number 177p. Current market price: $0.54 (foil $1.91), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, you may cast a permanent spell from your hand with mana value equal to 1 plus the greatest mana value among other permanents you control without paying its mana cost. If you don't, scry 1.