Like most Pokmon cards, the value of Mudsdale depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Temporal Forces)
Burn the little things efficiently and bounce the big things you cannot burn easily
When Kairi dies, your two options including bouncing any number of nonlands permanents with a total mana value of 6 or less or milling six cards and returning up to two instants and sorceries from your graveyard to your hand
Please contact the Pokemon Company directly via their 'Card and Parts Replacement Policy' for any manufacturer defects orerrors related to yourpurchasehere
I had no idea quite how important that side of things was until after the fact
Our Pokemon graded card marketplace is designed to provide a seamless shopping experience, with a wide array of cards that are perfect for both completing your collection and finding that rare gem