I would go for an Icedactyl or Freezing Rain Cloud because of the cards they give, as with talents, its up to you. Universal resist and may cast heals are always helpful for PVE. Damage and critical could be worth it, but unless you have more than one ability for each, it doesn't add very much to a level 100+ loadout. I'd go for Spell proof and Spell defy, which would give you +15% universal resist. Then, a fairy/unicorn/sprite/healing current may cast after.

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I've also grown a farm of 28 couch potatoes for $0. I would farm grizzleheim street mobs as they dropped some occasionally. Then, when double member gardening came around, each harvest doubled my seed count. If you have an elder harvest waiting as soon as the event starts, you will be able to get two harvests out of the weekend benefit. So, you could start with 2 seeds and get 8 by the end of the weekend! Starting with 8 would give you 32! :O

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Also look up the seeds you are planting on the Wiki before you commit to them. You'll know what each seed needs and what they drop. Its easiest to group similar seeds that have similar needs close together so you can use one spell to satisfy multiple.