Back on my bullshit. This time I decided to more or less skip ahead and start using the more high tier Paranormal creatures for this one. In this match, an Idigam (using as a baseline Kaninhah A'ku - so it's a Rank 5 idigam with Power 15, Finesse 10, Resistance 15, a lot of Essence to spend, Essence Shaping it can use its Essence pool on, a variety of Numina including Entropic Decay, Rapture, Regenerate, and Telekinesis, several Manifestations, and Shifting as its Dread Power) vs a Tempestuous and Annihilation.
A Tempestuous is a VD 360 creature of Energy with a Defense of 56, floating movement speed of 24m, immunity to Paralysis Conditions, resistances to Ballistics, Piercing, slashing and Energy 20 and vulnerability to Knowledge damage. It has a passive Radioactive Aura ability that causes anything within short range of it to take 2d20+20 points of damage, its Radioactive Spectrum passive let's it make all melee attacks and abilities at short range, its Radioactive Claw melee attack deals 4d20+20 damage and rolls a 5d20+40 to hit (with a Meleex2 modifier, which I'm pretty certain means it hits twice), it has a free (as in it triggers automatically once the conditions are met) Radioactive Energy Ray move where if it lands two claw attacks on the same being then it can fire a beam of pure energy that deals 4d20+20 points of Energy damage, and finally its Expand in Radiation move causes it expand in a burst of raw paranormal radiation that deals 10d20+20 points of Energy damage to anything in-range at the cost of removing 100 health from the Tempestuous's 950 point pool. Overall, whilst I think the idigam has some answers to the Tempestuous that it can't readily address (its Numina, mostly), it becomes a DPS race that I highly doubt the idigam has the means to totally keep up with even ignoring that the Tempestuous is either resistant to or outright immune to most forms of damage the idigam might try to employ. It MIGHT be able to try and siphon off the Tempestuous's 'Essence' (or whatever equivalent it has) but this would probably not end well for it. It might also try reshaping its Essence into something else, but again, doubtful that it would work as intended. And unfortunately, those are some of its only major plays that I could see actively getting past the Tempestuous's high defense and helping the idigam to power through its ridiculous damage output.
Now as for Annihilation - it's a VD 380 creature of Blood and Fear, it's over ten meters tall, has a health pool of 1200 points, movement of 15m, has a Defense of 58, Damage Resistance 50, rolls a 5d20+40 for its standard attacks, its Claw attack deals 4d10+30 Blood damage with a Melee x2 modifier, its Spiked Tentacles are another Melee x2 move that deal 2d12+30 Blood damage on a hit, it has a medium range Ranged x3 Spike Shot move rolling a 4d20+40 for 2d10+20 damage, as a reaction it can initiate a grab on any successful Spiked Tentacle attack (rolling a 5d20+50) and can hold up to four people, as another reaction it triggers a spiked tentacle attack against anything that moves 10 feet within short range of it, at the start of any of its turns it can use Squeeze and Destroy on those it has grabbed to deal 40 Blood damage, it has a Wing Flapping move that deals 8d6 Mental Damage (useless because all idigam are already insane and are probably too alien mentally to be affected) at long range and pushes people back 6m as well as stunning them for a round, has a Final Choke move where it moves 15m and grabs and strangles all in its path (again, useless against an idigam), and finally it has its Storm of Thorhs ability where it casts all of its thorns to deal 20d6+20 points of Blood damage to everything within medium range. Annihilation's Enigma of Fear is unknown, but upon resolution, it loses all damage resistance and its Storm of Thorns ability.
I will say that between its sheer tankiness, health, damage resistance and raw damage output, this does not favor the idigam at all in a straight confrontation. The only upside is that Annihilation is entirely mindless and like half of its moveset won't be of much use against an idigam. Even the most chaotic and gibberingly insane of the Moon Banished can out-think it with trivial ease. On top of that, it is /incredibly/ slow and any idigam can either simply run the fuck away once they realize this or just hop through the Gauntlet because it has no means of pursuit in that manner. Annihilation is a civilization ender per its own lore blurb, but it is also basically a blind catastrophe and can be pretty simply evaded if you lack the means to take it on directly.