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Tangled Colony probably works best in multicolor decks where you have access to some direct damage spells, or at least spells that force creatures of your choice to fight.

Given the prices for the average rare and mythic, foil and special frame variant, plus the serialized prices, companies will open boxes if they can get an amount of money for the singles that accounts for the cost, both from the distributor and the company itself (time paid to employees to sort, store, and ship)

Serendib Djinn ($152) I wouldnt blame you if you thought Serendib Djinn was a 2-mana spell, but thats just how the print looks

Resplendent Angel Resplendent Angel will synergize well in a lifegain token deck by generating an angel on the end step of any turn where you gained 5 or more life

Note that the Special Illustration Rare (#116) of this same Pokemon was done by a different artist, Susumu Maeya