Embodiment of Agonies

• WOTC Official Reminder Textofficial rules
  Deathtouch — Any amount of damage this deals to a creature is enough to destroy it.

• WWizards of the Coast2019-07-12
  Official Ruling
  If you return Embodiment of Agonies from your graveyard to the battlefield, its last ability counts itself.
• WWizards of the Coast2019-07-12
  Official Ruling
  The mana cost of a split card is determined by its two halves combined. For example, the mana cost of Fire//Ice in your graveyard is , the same as the mana cost of Ral's Outburst.
• WWizards of the Coast2019-07-12
  Official Ruling
  Alternative costs, additional costs you could pay, cost increases, and cost reductions are all ignored by Embodiment of Agonies.
• WWizards of the Coast2019-07-12
  Official Ruling
  Embodiment of Agonies checks the mana symbols in a card's mana cost. For example, a mana cost of is different than a mana cost of .
• WWizards of the Coast2019-07-12
  Official Ruling
  Every Magic card has either no mana cost or exactly one mana cost. A card with no mana cost is never counted by Embodiment of Agonies. A card with a mana cost of is counted.
• WWizards of the Coast2019-07-12
  Official Ruling
  Hybrid mana symbols are treated as the actual symbols, not as either of their two components individually. For example, , , and are three different mana costs.

Rulings via Scryfall