As a one-cost, it's easy to work this character in with other plays, so sometimes it's better to play Pluto alongside a two-cost character on turn three just so you can play a five-cost Nani, Protective Sister on turn four
Silvan Reveler Thorin, Oakenshield Bard, King of Dale The Queen of Dale Thranduil, the Elvenking The Lonely Mountain Thorin, Mountain-king Bilbo, Thief in the Night The Arkenstone Smaug the Magnificent Bilbo, Luckwearer Wood Elves Riddles in the Dark My Precious Tom, Bert and William An Unexpected Party Forest Mountain Swamp Island
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Which brings us to the next point
Therefore, I cant wait to see whats to come with lucky number 7
That creature is very dead, and you did it for only two mana