How to win (WIP, only made it to halfway through drawbridge so far):

1. Make infinite mana then find a sink

Full combos:

• Viridian Longbow + [any infinite untap] → ping everyone to death with longbow (this happens to work with every infinite mana loop but doesn't require infinite mana, since all include infinite untaps)

Infinite mana sources:

• Wirewood Symbiote + Mirror Entity + any creature that taps for 3+ → make symbiote an elf, return/replay symbiote repeatedly untapping mana dork, repeat (this still works with longbow, just float infinite mana then untap for bow)
• Devoted Druid + Melira, Sylvok Outcast

2. Generate infinite tokens and use Crashing Drawbridge to give them haste, or pump everything on your board to infinite power

Full combos:

• Wirewood Symbiote + Mirror Entity + [board haste enabler] + Stormfront Riders + any creature that taps for 2+ mana → return/replay symbiote repeatedly untapping the mana dork, give stuff haste, swing
• Devoted Druid + Melira, Sylvok Outcast + Presence of Gond + [board haste enabler]
• Devoted Druid + Coat of Arms + Presence of Gond + [board haste enabler]

Board haste enablers:

• Crashing Drawbridge + Lightning Greaves (optional) → just have one out already and tap it, or give the bridge haste and tap it
• Mirror Entity + Reflex Sliver → make tokens elf slivers

3. Generate infinite ETB triggers or infinitely sac/return creatures

Full combos:

• Altar of the Brood + [any infinite etb] → mill all opponents, tap Selvala to win (and her ability is a mana ability, making things even funnier)
• Essence Warden + [any infinite etb] → infinite life, win later

Infinite etbs:

• Wirewood Symbiote + Mirror Entity + any creature that taps for 2+ mana → tap for mana, make everything an elf cat dog, return symbiote (untapping dork), recast symbiote, repeat
• Any infinite token generator without the haste enabler

4. Memery with Melira, Sylvok Outcast

Full combos:

• Viridian Longbow + Melira, Sylvok Outcast + Devoted Druid --> equip bow on druid, ping, untap, repeat.

A note about some convoluted combos

The combos above are not an extensive list. Some are too convoluted to explain in detail since they're so unlikely to be necessary. For example, let's examine replacing Mirror Entity in:

Wirewood Symbiote + Crashing Drawbridge + Priest of Titania + Stormfront Riders + Mirror Entity

This one is already pushing the limits of usefulness, and since symbiote already produces infinite etbs without Stormfront Riders, we're assuming we don't have an infinite etb wincon.

The "easiest" way I see to do this is to find a sac outlet. Let's assume we hit Fanatical Devotion. Add in Twilight Shepherd as well. Oh, and we're going to need Melira, Sylvok Outcast. Now you can return a cheap elf with symbiote, make more mana off of Titania, replay cheap elf, sac symbiote, sac shepherd, replay symbiote, repeat. Each time, Stormfront Riders makes a token. Then you win, but you actually don't because this definitely won't happen.