[ Plant / Tuner / Effect ] You can Special Summon this card (from your hand) by discarding 1 card. If this card is Tribute Summoned by Tributing 1 "Harvest Musou" monster: You can target 1 "Harvest Musou" monster in your GY; Special Summon that target. If this card is sent from the field to the GY for the Synchro Summon of a "Harvest Musou" Synchro Monster: You can target 1 "Harvest Musou" monster in your GY; equip it to 1 monster your opponent controls with this effect. ● The equipped monster loses 1000 ATK. You can only use this effect of "Arum Lockseed" once per turn.