Sorry didn't see your post before I played the deck. I'd thought having the mana rock would compensate not having the 18th land, but there's a good chance you were right about it. After all, the deck never runs out of gas thanks to Keruga.
I did -Mythos +Coordinated Charge (more on this later) and went 4-3. Deck was meh. I can see the allure of playing Keruga and indeed, the card was absurd, often drawing 3+ cards when it enters play. What's more, Keruga can be recurred by Biollante & Eerie Ultimatum. If anything the amount of card draw made me concerned about decking a couple of times. Keruga also made it so that I practically never lose the late-game. However, not having any plays before turn 3 is a huge drawback. I lost a couple of games to opponent simply tempoing me out when I was on the draw. Even if I could play some blockers, they would use their combat tricks/removal and hit me for a few more points. If I ever draft this again I will put a heck load of emphasis on 3-drops (missing that too is simply unacceptable), and get defensive creatures too. On a side note, I suspect it's desirable in BO3 to put Keruga into the mainboard (and siding in 1/2-mana cards) on the draw against an aggressive deck.
Overperformers:
- Extinction Event. The card was incredible, and was often a 3-4 for 1 that killed my opponent's best creatures. I don't know if I just got lucky, but the fact that I get to choose which number + when to cast it had a huge impact.
- Keruga. See above. This card should never be passed P1P1, it's a bomb.
- Pouncing Shoreshark.
Exclusion Mage was already a good card, and being able to do this at instant speed is huge. The body is respectable too. Unfortunately it can't target your own creatures (c.f. Pacifism, Capture Sphere), but I think it's still a top-tier blue card.
- Biollante. Mutating this was usually game over.
- Indartha Crystal. Amazingly, this card overperformed. The ramp + fixing was not just appreciated, it's a 3-mana card to draw cards with using Keruga.
- Convolute. Like Indartha Crystal, this card amazingly overperformed. I don't think it's good in general and maybe it's my opponents not respecting it (which is possible, since it's not a good card in most draft formats), but it caught several big creatures in the run.
Underperformers:
- Wingfold Pteron. Don't put this card in your deck. I was actually under the impression that this had natural flying, except of course it doesn't.
- Charge of the Forever-Beast. It's not that the card is bad, but that I didn't have enough big creatures to use it with (I can't use it with Keruga either).
- Mythos of Brokkos. It was terrible. First it conflicts with Biollante & Eerie Ultimatum (cast either of those and suddenly there's nothing more to return), second it's so mana intensive. Like, it's 2GG.
Soul Salvage is just 2B, and that's already not a high pick. Since all my cards are 3+CMC, I'm not likely to be playing anything else on the same turn, making for a huge tempo loss. The ability to tutor a target is nice and dandy, but in my deck I'm winning the late-game anyway so it's unnecessary (plus thinning my deck could actually lead me to deck out some times). This card might not be playable, unless one is in Sultai colors and needs some grinding power. That seems like a big ask.
Eerie Ultimatum was okay. Like mutating Biollante, it was usually a game-winning card if cast in the late-game, but it's of course very hard to cast and a dead draw early. I imagine a fair comparison is something like
Overrun. Avian Oddity was surprisingly okay, but mostly because it was a reasonable blocker as well as a flying mutate target. I don't think it's good in general; it's playable but below average. Fertillid was meh. I didn't have time to ramp, and it's not exactly a good mutate target since the ground stalled quite a bit.
In addition to how to draft Keruga, I'd say a lesson I learned in this draft is to get mutate targets. Mutating onto Farfinder is great, mutating onto Bristling Boar is much less great. Acceptable on some board states, but in general one should be aiming for more.
Funniest play of the run has got to be when opponent cycled
Easy Prey against me
Technical notes:
1. If you bounce a mutated creature,
both cards return to their hand.
2. Tokens count as even CMC for Extinction Event.