Here's the list I made. In testing, it's been REALLY consistent. Turn 1 or 2 kills goldfishing almost every hand. The times it goes to turn 3/4, it's setting up with teferi and/or accumulating multiplte FoWs to punch through. It's almost immune to creature removal because once Zirda resolves, you can activate the untap of a monolith multiple times in response and get infinite mana. Once you have infinite floating, Zirda can die and you still win.
// V_1_Monolith Combo
// 61 Maindeck
// 22 Artifact
4 Basalt Monolith
4 Grim Monolith
1 Mox Emerald
1 Mox Sapphire
3 Mox Opal
1 Black Lotus
1 Sol Ring
1 Mana Crypt
1 Time Vault
1 Manifold Key
1 Mox Ruby
1 Mox Pearl
1 Mox Jet
1 Memory Jar
// 3 Creature
2 Urza, Lord High Artificer
1 Walking Ballista
// 13 Instant
4 Paradoxical Outcome
1 Mystical Tutor
4 Force of Will
1 Ancestral Recall
1 Brainstorm
1 Stroke of Genius
1 Mental Misstep
// 12 Land
1 Tolarian Academy
1 Misty Rainforest
2 Tropical Island
1 Island
4 Tundra
1 Polluted Delta
1 Flooded Strand
1 Scalding Tarn
// 3 Planeswalker
1 Karn, the Great Creator
1 Narset, Parter of Veils
1 Teferi, Time Raveler
// 8 Sorcery
1 Channel
1 Time Walk
1 Tinker
1 Preordain
1 Ponder
1 Merchant Scroll
1 Timetwister
1 Gitaxian Probe
// 15 Sideboard
// 5 Artifact
SB: 1 Mycosynth Lattice
SB: 4 Soul-Guide Lantern
// 2 Creature
SB: 1 Zirda, the Dawnwaker
SB: 1 Walking Ballista
// 4 Instant
SB: 3 Hurkyl's Recall
SB: 1 Flusterstorm
// 3 Planeswalker
SB: 3 Teferi, Time Raveler
// 1 Sorcery
SB: 1 Balance
Common plays are to combo with Zirda and 1) just infinite activate Urza, play out your deck and have multiple construct 20/20s, then time walk 2) ballista for infinite 3) stroke (or scroll into stroke) for infinite 4) jar/twister/PO into nuts CA and combo 5) vault/key 6) Karn -> ballista from sb, or 7) channel on turn 1 for karn -> mycosinth lattice and win at your leisure.
TLDR; Zirda is busted as hell.