Tromokratis
As a Mythic Encounter
Source: Mythic Odysseys of Theros
Tromokratis numbers among the most powerful creatures a group of adventurers might face. If you wish to make an encounter with the kraken truly legendary, Tromokratis might use its Hearts of the Kraken mythic trait. When this happens, it calls upon a reserve of strength just as it appears to be vanquished. After its hearts are exposed, Tromokratis can choose one of its mythic actions when it uses a legendary action.
Read or paraphrase the following text when Tromokratis uses its Hearts of the Kraken trait:
The titanic monster’s carapace cracks, revealing a pulsing, red-purple heart buried amid heaps of blubber and muscle. Fissures run across the beast’s ancient shell, revealing three other mighty, ichor-slick organs. The sea terror thrashes, channeling pain into fury.
Fighting Tromokratis as a mythic encounter is equivalent to taking on two CR 26 creatures in one encounter. Award a party 180,000 XP for defeating Tromokratis after it uses Hearts of the Kraken.