The long labours of Dubh in Tuath continue, as he refashions the deep channels and inner seas of the continent into something more amenable to his own taste - and his own taste for what form of life should prosper. Partly due to a colder climate than the seas between Tuath and Deas, and partly due to the upheavel of his labours, the north of the continent surrounding the becomes a much barer land - endless dunes and sand-seas giving rise to a very different type of ecosystem on land, which conveniently become home to more of the worm forms over millions of years.
Volcanic eruptions continue to spew greenhouse gases into the air, and he sea levels continue to rise as more of the icecaps melt. Some more smaller islands are submerged, but great parts of the coasts of some of the continents, too, drown beneath the waves. In these shallow seas, and the great saltmarshes common across the land, life does blossom.
Fion is active also - and most notably, in encouraging the proliferation of back-boned creatures - a collective evolutionary family known as iasg-fion - in the seas. Having only just scraped through the past few ages in the polar seas, these adaptable creatures spread across the glove quickly, great shoals of them following the still large photosynthetic blooms within the sea currents. They are not alone however - as a number of the creatures which evolved on the seabed to escape the worms with harder shells, begin to float on the sea currents, adding to the diversity of the deep-sea waves.
The iasg-fion do however begin to become more numerous within the shallower seas of Deas and north-west of the world. Some of the polar forms closest to the originals die out - but the diversity of this family is great indeed. In an attempt to escape from predators and to protect their offspring - in the larval form - some even begin to beach themselves on land for reproduction, before returning to the seas, and over many millions of years, these diverge into an amphibious branch of the iasg-fion.
True to form, it is with the land that Geal is most concerned, compared with Dubh or Fion - for the divine further encourages the spread of plants, some semi-submerged on the wide tidal planes, onto the land. Geal's work is not necessary for it's spread and diversification, however. As the mosses and primitive plantlife of old dies, the decomposing remains enriches and deepens the ground - allowing more and more of the land of Deas in particular, and the many island chains, to become green with life, and leaves begin to make ever more exotic appearances - grasses and ferns encouraging creatures to follow. From worms which burrow in the tidal sand dunes and eventually slither onto the ground, to more terrestrial forms of the slug-like or exoskeletal shelled creatures, life begins to reach all the world.
Dubh's work becomes apparent here, too, for some of the worms begin to spread onto land, and develop primitive legs. Though still soft-skinned in general, and reliant on wet habitats, they begin to proliferate. They are hampered somewhat by their success, however, for Fion creates small parasites that hamper their spread. Many of the terrestrial forms die out, as do the deep-sea forms which were most susceptible. A minor extinction event occurs where this disrupts more fragile ecosystems, resulting in many of the parasites dying out, as well as some of the worms.
In the marshes, the lagoons, the sea-beds, the deserts and the dunes of the world, however, both herbivorous and especially carnivorous forms remain most successful. to Fion's distaste.
Geal begins to aid the spread of the sturdier plants in the north-west by strengthening their roots. These plants begin more and more to resemble primitive trees - for their stalks are strong and resistant to wave, wind or rain. They become the dominant form of plant life in the north-west - though more basic forms of them do appear of their own accord in Deas. He also creates a small, insect like creatures which feeds on the leaves of these new plants - and these, too, become very successful in the north-west. Though not as yet spread south or east, they begin to evolve into a myriad of different forms, adding to the ecosystem of this primitive rainforest, and eagerly eaten by amphibious iasg-fionn - backboned predators - or more advanced nathairdubh - the worms - alike. Some even begin to take flight.
A stranger ecosystem still develops in the southern polar sea, however - as, instead of green, purple, fungal type forms of life begin to spread. Spores carried on the winds bring great fungi to much of the region, and some begin to grow tall indeed in sheltered islets and coves