Most importantly, because effects on a card are completed in the order they are printed, you can retrieve the card you place into your graveyard with Mythos of Brokkos
Archelos, Lagoon Mystic Archelos, Lagoon Mystic is an interesting Sultai creature if you want to get rid of the enters tapped downside on other cards, like tapped lands or ramp spells that put the land onto the battlefield tapped
This Amber and Sapphire ink deck is a very fun one with a heavy focus on the Seven Dwarf characters included, which all synergize well together with special buffs that affect other Dwarf cards
For decks full of one or two drops, this card can be a nightmare for which they will happily trade multiple cards, as the Keg amounts to a two mana one-sided Wrath of God or sometimes even worse by killing artifacts like Cursed Scroll, Winter Orb or Ankh of Mishra
While his stats may not be perfect, you wont want to risk him in a challenge or quest