Its 7/11 body makes it a serious threat, and thanks to artifact synergies or cheat-into-play effects, it often comes down much earlier than expected
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It also cleverly hides a Vileplume amongst the flowers, adding a nice little detail regarding what other kinds of Pokmon live among the Exeggutor in this particular environment
The heaviest moments come at the end of the game, where Tidus reveals to Yuna that he's going to disappear after their final fight ( Final Fantasy games can get a little weird)
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-2/-2 is already a reasonable removal spell for the early game, but you can easily sacrifice a throwaway artifact/creature to kill just about anything in the format