(If they're equipped to the same creature, the abilities of the equipped creature will also trigger three times.) An ability of the equipped creature that triggers when a card is put into a graveyard "from anywhere" triggers twice only if (a) a creature card was put into a graveyard from the battlefield and (b) The Masamune is still on the battlefield and attached to the creature with the relevant ability
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With the right setup, this can snowball fast, and fuel combos or flood the board while you keep your hand full
Primal Prayers was first released in the set Modern Horizons 3, illustrated by Yeong-Hao Han
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Kotis, the Fangkeeper Kotis, the Fangkeeper does need to get combat damage through, and while it is not evasive, indestructible goes a long way in making this an incredible voltron commander that ends up playing lots of different cards once it connects