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
+2: Look at the top card of target player's library
Sunlit Marsh
If youve not played with cards like these before, theyre worth picking up mid-pack as insurance in case you later end up with splashable cards in that color
It already mills half of the opponent's library just by casting it, not needing to resolve, has a Ward that makes it hard to eliminate, and has stat line boosts and Annihilator based on the exiled cards in the game
While there are a plethora of Summon cards to suit various types of decks, a deck dedicated to summoning and summoners is viable in its own right