yugioh dark hole dragon deck AGOV-EN020 – Aus Ygo Dark Hole Dragon, Horus Engine,

The player whose turn it is discards down to his or her maximum hand size

Decks running the Inteleon engine will find Hisuian Heavy Ball particularly useful as they are reliant on having as many Sobbles on the bench as possible in order to fully utilize Drizziles Shady Dealings ability

Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke

For sales of that magnitude - or at least sales that could result in extreme profits - collectors may want to hold onto their cards