Soul Vessel

At the beginning of your upkeep, put a Vessel Fragment counter on this card.

{t}: Add {x} mana of any combination of colors, where X is the number of Vessel Fragment counters on this card divided by 3, rounded down. Mana generated this way may only be used to cast instant spells that mention The Knight, Sealer of Dreams

There may be no more than 9 vessel fragments on this card.