So, this is a Naturalize on a stick that can block, attack, add to your Wellwisher and Timberwatch Elf count and more, all for just one more mana than a 2/1 or Naturalize would cost
and for way cheaper than you would pay anywhere else
There's not much to say about Unravel the Aether that I didn't already explain, so I'll spare you the repetition and only mention that both of these cards can be used to save your valuable artifacts and enchantments from removal in a pinchas long as you're okay with shuffling them into your library instead
C Common Eria the Water Charmer, Gentle X WATER Link 2 [ SpellcasterLinkEffect ] ATK 1850 DEF - 2 monsters, including a WATER monster (This card is always treated as a "Familiar-Possessed" card.) You can target 1 WATER monster in your opponent's GY
These become truly fearsome in EDH, since land destruction is so discouraged on a social level
However, you may do so only during one of your main phases when the stack is empty