All those enchantments are important to Eerie cards and ensuring you have enough enchantments or Rooms for Eerie helps drive your draft decisions
Not because they are so painterly or colorful, but because they abandon the detailed backgrounds found in more recent SIRS in favor of detailed closeups on the Pokemon themselves
Specialize lets you pay mana and discard a card to essentially transform the specialize card into a different version of the card that has some effects unique to the color your specialized in
Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keywords (such as prowess) are triggered abilities and will use "when," "whenever," or "at" in their reminder text
They embody the urge to violence, and the hunting instinct within the human heart, gathering in wild packs or hunting alone under the silver moon