Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Exsanguinate by paying {B}{B} and all remaining available mana, causing each opponent to lose a significant amount of life and you to gain life equal to the life lost this way.

Near-infinite lifegain

Near-infinite lifeloss

Yavimaya Bloomsage // Channel

Exsanguinate

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast a copy of Exsanguinate by paying {B}{B} and all remaining available mana, causing each opponent to lose a significant amount of life and you to gain life equal to the life lost this way.

Stensian Sanguinist // Exsanguinate

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Torment of Hailfire by paying {B}{B} and all remaining available mana. Each opponent will lose 3 life unless they sacrifice a nonland permanent or discard a card for each mana paid beyond the {B}{B}.

Torment of Hailfire

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Crackle with Power by paying {R}{R} and all remaining available mana, dealing a large amount of damage to a set number of targets.

Near-infinite damage

Crackle with Power

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Comet Storm by paying {R}{R} and all remaining available mana, dealing a large amount of damage to a set number of targets.

Comet Storm

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Jaya's Immolating Inferno by paying {R}{R} and all remaining available mana, dealing a large amount of damage to up to three targets.

Jaya's Immolating Inferno

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Fireball by paying {R} and all remaining available mana, dealing a large amount of damage divided among a set number of targets.

Fireball

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Debt to the Deathless by paying {W}{W}{B}{B} and all remaining available mana, causing each opponent to lose a significant amount of life and you to gain life equal to the life lost this way.

Debt to the Deathless

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel by paying 1 life, adding {C}.
Repeat step 2 as desired.
Cast Ribbons from your graveyard by paying {B}{B} and all remaining available mana, causing each opponent to lose a significant amount of life.

Cut // Ribbons

Cast a copy of Channel by paying {G}{G}.
Activate the ability granted by Channel four times by paying 4 life, adding {C}{C}{C}{C}.
Cast Sprout Swarm with buyback by paying {4} and either tapping a green creature if you're able or paying an additional {G}.
Aetherflux Reservoir triggers, causing you to gain 1 life for each spell you've cast this turn.
Resolve Sprout Swarm, creating a 1/1 Saproling creature token and returning Sprout Swarm to your hand.
Repeat from step 2.

Infinite creature ETB

Infinite colorless mana

Infinite damage

Infinite lifegain

Infinite magecraft triggers

Infinite storm count

Infinite tapped creature tokens

Aetherflux Reservoir

Sprout Swarm

On the end step prior to your turn, activate Emergence Zone by paying {1}, tapping it, and sacrificing it, allowing you to cast spells as though they had flash this turn.
Cast a copy of Channel from exile by paying {G}{G}, unpreparing Yavimaya Bloomsage.
Activate Channel by paying 1 life, adding {C}.
Repeat step 2 until you have exactly 1 life.
At the beginning of your upkeep, Near-Death Experience triggers, causing you to win the game.

Win the game

Near-Death Experience

Emergence Zone

Cast a copy of Channel from exile by paying {G}{G}, unpreparing Yavimaya Bloomsage.
Gain at least 1 life by any method.
When you gain life, Dawn of Hope triggers.
Use Channel's ability three times by paying 3 life, adding {C}{C}{C}.
Activate Words of Worship by paying {1}, creating a replacement effect.
Resolve the Dawn of Hope trigger, paying {2} and gaining 5 life instead of drawing a card due to the replacement effect.
Repeat from step 3 any number of times.
Once you have an arbitrarily high life total, you may use Channel's ability any number of times, adding infinite colorless mana.

Words of Worship

Dawn of Hope

Cast a copy of Channel from exile by paying {G}{G}, unpreparing Yavimaya Bloomsage.
Activate Phyrexian Altar by sacrificing the lifegain creature, adding {U}.
When that creature dies, Fool's Demise's first and second abilities trigger.
Resolve the first Fool's Demise trigger, returning that creature from your graveyard to the battlefield.
When that creature dies or enters (depending on the card), it triggers, gaining at least 4 life.
Resolve the second Fool's Demise trigger, returning it from your graveyard to your hand.
Use Channel four times by paying 4 life, adding {C}{C}{C}{C}.
Cast Fool's Demise by paying {4}{U}, attaching it to the same creature.
Repeat from step 2.
To achieve the infinite colorless mana and infinite lifegain results, you need to gain at least 5 life per loop.

Infinite creature LTB

Infinite death triggers

Infinite lifegain triggers

Infinite creature sacrifice triggers

Creature that gains at least 4 life

Fool's Demise

Phyrexian Altar

Cast a copy of Channel from exile by paying {G}{G}, unpreparing Yavimaya Bloomsage.
Use Channel's ability by paying 1 life, adding {C}.
When you lose life, Vilis triggers.
In response, activate Words of Worship by paying {1}, creating a replacement effect.
Resolve the Vilis trigger, causing you to gain 5 life instead of drawing a card due to the replacement effect.
Repeat from step 2 any number of times.
Once you have gained an arbitrarily high amount of life, you may use Channel's ability any number of times, adding colorless mana and drawing cards with Vilis.
Once you have drawn your library, you will have {C} for each card drawn this way.
You can then continue to use Channel, adding infinite {C}, as long as you have drawn a way to remove Vilis or can use the mana to win at instant speed before Vilis's triggers resolve and cause you to lose by drawing from an empty library.

Combos with "Yavimaya Bloomsage // Channel"