As such I increasingly cut those cards where possible from my lists and would use them more like sideboard tools
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It works, flavour-wise, as the Polar Kraken keeps eating your lands, but generally big creatures are afraid of creature-specific removal even without an increasing tumour of a downside

2 Traditional foil common MSC cards A reprint card from Jumpstart Boosters (50%) A new-to- Magic Jumpstart card (50%) 1 Traditional foil uncommon MSC cards A reprint card from Jumpstart Boosters (18.6%) A new-to- Magic Jumpstart card (81.4%) 1 Traditional foil common (20%) or uncommon (80%) scene card 1 Traditional foil city calm (50%) or city chaos (50%) basic land 1 Traditional foil rare or mythic rare card A rare (45%) or mythic rare (9.4%) card from the main set A double-faced mythic rare (1.4%) scene card A double-faced mythic rare (1.4%) logo card A rare (33.8%) or mythic rare (4.1%) new-to- Magic card from Jumpstart Boosters A rare reprint card from Jumpstart Boosters (3%) A mythic rare new-to- Magic card from Welcome Decks (1.9%) 1 Non-foil Booster Fun card from the Commander decks 203 Extended-art rare cards (93.6%) Includes 92 reprints and 111 new-to- Magic cards 7 Extended-art mythic rare cards (3.2%) Includes 4 reprints and 3 new-to- Magic cards 7 Borderless face commanders (3.2%) 1 Non-foil rare or mythic rare Booster Fun card An extended-art rare (27.8%) or mythic rare (2.3%) card from the main set A rare (6.4%) or mythic rare (4.9%) scene card A rare (15.1%) or mythic rare (4.6%) logo card A rare (12.1%) or mythic rare (2.6%) panel card A borderless card from the Scene Boxes (13.9%) A borderless rare land (5.8%) A borderless source material card (4.5%) 1 Non-foil (75%) or traditional foil (25%) source material card 1 Foil Booster Fun rare or mythic rare card A traditional foil extended-art rare (31.8%) or mythic rare (2.7%) card from the main set A traditional foil rare (7.3%) or mythic rare (4%) scene card Double-faced scene cards do not appear in this slot

To make the most of this effect, we will want to wait to use the ability until we have a critical mass of creatures and other anthem effects on the board
Like all the other Power Nine cards, the Mox Sapphire is currently restricted in Vintage tournament format, and banned altogether in Legacy