Alright, so now that I've played several games with Nyxbloom Fields, let's talk about some of the silly **** you can do with this deck.
We'll start with Reclaimer. Starting on Turn3 you can turn him into a surprise 3/4 Blocker. It's not the way the deck want's to ramp because you end up with the same amount of mana. But if you're facing a hyper agressive deck it might be your only means of survival. If you have 3 lands, 2 untapped, you can use his ability at instant speed to surprise block a 3/3 or smaller. Just sac one land for a Lotus Field, and then sac the other two lands to Lotus Field and that puts enough lands in the GY to turn his static ability on.
On Turn 4 with Reclaimer you can use him to search up a Lotus Field and (with Full Control On) pay for a Repudiate to counter the Fields ETB. This will give you enough mana to cast a Nyxbloom Ancient on T5 if you hit your next land drop or have Kiora. It also gets the Reclaimer ready to activate once you find a second lotus. You can also do this with 3 lands and Kiora in play. Just make sure you use Kiora's ability for the 4th mana BEFORE you activate Reclaimer.
Once you have Nyxbloom Ancient in play the deck just goes absolutely bonkers. For example,
Castle Garenbrig now makes 18 green mana when activated. So, with 2 other lands, you'll tap them for 6, use 4 of it to activate Castle and end up with 20 mana out of 3 lands.
If you use Lotus Field instead, you'll get 9 from Lotus, use 4 for Castle and end up with 23 mana. We can't use that mana on anything except Hydroid Krasis though because it doesn't work for Mass Manipulation or planeswalkers. Also, you have to then use a blue land because Garenbrig only makes Green. However, having a 24/24 Krasis isn't a bad way to win a game, or at least, refill your hand and give your life total a nice cushion. If I'm going off, I usually won't use all of my mana on a Krasis. Something like a 16/16 Krasis is usually enough and being able to then play whatever you draw on the same turn is nice. You can't use Garenbrig's mana to activate it again if you untap it with Kiora, however, finding 4 more mana with Ancient in play should not be a problem. For a total of 36 mana from 1 land!
I've cast some ridiculous Finale of Devestations for upwards of X=36 once the full ramp package is out. They'll need multiple instant speed removals/bounce or Settle the Wreckage to survive a swing like that.
If you have both Lotus Field/Repudiate and Kiora in hand on T3, what is the stronger play? If you go with Field T3 you can play Kiora with Field and untap it to have 5 (or 6 if you hit your land drop) mana. If you play Kiora T3, then do Lotus Field/Repudiate T4 you can untap the Field with Kiora but you've spent 2 mana on Repudiate. Even if you hit your land drop you only have 4 mana to play with. If you plan to play QBeast or Champion it doesn't matter. If you plan to play Nissa, then you want to play Field on T3. Either way, I would play Field/Repudiate ASAP. If you're facing counterspells I'd rather have Repudiate countered than Kiora. If you get Kiora in play with Field you can still play almost everything in the deck with 1 more land drop. You're a mana down if you get Repudiate off and Kiora is countered. Besides, Kiora is your only draw engine.
Be careful with Nissa and Lotus Field. They do have Hexproof which makes them immune to targeted removal but they can be swept away with Wrath effects. You don't want to lose a Lotus Field.
With that said, you can make ridiculous amounts of mana with Nissa and Kiora even without Ancient in play. With a forest you can make 6 mana in one turn by tap/Activate Nissa/tap again/Activate Kiora/tap again. That sequence on Lotus Field will produce 9 mana. This is a good way to get really big Krasis' which will draw you into the rest of your deck, or to fuel a Finale FTW.
Okay, so for example this is the crazy **** that happened in my last game. They killed my reclaimer T3, so I couldn't go fetch a Lotus Field, but I had Kiora in play. I play QBeast T4. T5 I play Garenbrig, I use it and untap a land to drop Nyxbloom Ancient. T6 shenanigans happened! I activate Garenbrig for 18, drop a second Ancient, untap Garenbrig with Kiora. I then play an 18/18 Krasis, draw and play RazeBoar and attack with it, a 7/7 Ancient from last turn and a 6/6 QBeast. 2nd main I play a 2 Steel Leaf Champions and 2 Reclaimers. T7 I Replicate the Boar for 81 Trample Damage.