VintageFTW

Instead of Burst of Speed, you could use Cartouche of Zeal, Chaos Charm, Crimson Wisps, Expedite, Fever Charm, Hammerhand, Mark of Fury, Messenger's Speed, Prophetic Ravings, or Reckless Charge,

Yeah, Gifts literally reads "four cards with different names"

Blood Clock, Curse Artifact, Flay, Insubordination, Isolation Cell, Kazuul, Tyrant of the Cliffs, Rhystic Cave, Sirocco, Umbilicus, are just a few more cards that offer choices. By the way, 20 land seems very low, and you have no mana fixing. On a budget, I'd say Akoum Refuge and Bloodfell Caves would be your best bet, with Temple of Malice, Dragonskull Summit, Foreboding Ruins, Lavaclaw Reaches, Shadowblood Ridge, Smoldering Marsh, or Tainted Peak as a little more expensive.

If you're playing Borrowed Grace, you might as well play Rally the Peasants instead. I mean, it's kind of a non-bo with Ash Zealot, but I think there are situations where you could get value. Also, since most of your creatures sacrifice themselves anyway, you could use Collateral Damage or Fling or Hazoret's Favor. Impetuous Devils and Spark Trooper are also both good options. Rally the Ancestors also works pretty well at X = 2. Just a couple of thoughts.

No trample?

Primalcrux seems expensive, but I did make room for Ooze

Most of my creatures aren't big enough to turn on Rhonas.

If you're going for Pauper Mono-Green Stompy, consider using stuff like Garruk's Companion, Aspect of Hydra, and Rancor

I love Bogles! For your sideboard, you could use Leyline of Sanctity to protect against 'sacrifice' effects, as well as cards like Seal of Primordium, Solemnity, Rest in Peace, Stony Silence, Suppression Field, Defense Grid, or Unflinching Courage.

If you're working with infinite mana, Gelatinous Genesis seems better than Slime Molding. What better than an infinitely big slime? How about an infinite number of infinitely big slime! Then again, you might as well play Sands of Delirium, which automatically kills an opponent

I mean, Dragonlord's servant is fine, but if it's just for mana acceleration, you might as well use Rampant Growth or Into the North (with Highland Weald) instead, because it will also help with Mindswipe and Crucible of Worlds. Or you could use Dragonspeaker Shaman, who reduces Dragon costs by 2.

Right, I'm using it just for the virtue that it's an artifact land, kind of like Darksteel Citadel.

Painful Truths, always a good one.

I steered clear of blue because it's tough to have pauper three-color mana fixing. I do like your ideas, though, but it seems like a pretty big overhaul that would call for like a whole new list. Sorry

Servo Schematic would be great, but it's uncommon, unfortunately. Pauper is a format where you can only use common cards.

Interesting options. Do you have any recommendation on what to take out? To me, Myr Moonvessel and Cathodion don't really give that much advantage, as most artifacts are sacrificed during combat.

The best ramp in non-green decks are, of course, artifacts. Sky Diamond, Marble Diamond, Azorius Signet, Azorius Cluestone, Azorius Keyrune, Ojutai Monument, Fieldmist Borderpost, Seashell Cameo, Talisman of Progress, Chromatic Lantern, Wayfarer's Bauble, Dreamstone Hedron, Hedron Archive, Mind Stone, Sol Ring, Thran Dynamo, Worn Powerstone, or utility artifacts like Magnifying Glass or Unstable Obelisk or artifact creatures, Hedron Archive, Alloy Myr, Gold Myr, Palladium Myr, Plague Myr, Silver Myr. Good creatures to replicate include Reflector Mage, Cloudblazer, Spire Patrol, Archangel of Serenity, Angel of Sanctions, Baneslayer Angel, etc.

While I'd agree "I Broke Pauper" is an overstatement, I imagine the guy was just trying to have an attention-grabbing title.

Botanical Sanctum

Domri Rade is stellar in a deck just like this. I find Garruk's Packleader better than Elemental Bond, Destructive Revelry is better than Nature's Claim, Zhur-Taa Druid is good at hindering some planeswalkers. Decimate is good removal, Kessig Wolf Run is a good land, War's Toll is good against control decks, Into the North is better than Rampant Growth if you play Highland Weald, Stomping Ground works well with Farseek. Overall, great deck!