Spoiler: OOCNothing too mischievous. Could it be a hobgoblin fruit version of chillis? Like stupidly hot chillis?
'Magic my friend.' Reggy was enjoying himself, relishing the role of the huxter. It was good to be out of that rotting house 'A small taste of what the tree can do for you. You plant this down, wait a few months, you'll have quite the gift to present to your Queen.'
SpoilerPresence+Persuasion to 'sell' the seed
(6d10)[2][7][4][1][10][10](34)
10-again
(6d10)[1][2][4][9][8][5](29)