First, my lands should be untapped.
Okay, lot of triggers, so double-check to make sure I get them all right
EDITED after Mooseman pointed out his Martyr does NOT have deathtouch :face palm:
First off, everyone but my original Dreadhorde dies
and you take 4 from the Assault Team
Not sure it matter here, but as an exercise in rulings, triggers I control go on first in any order I choose, so the Populace triggers, the Dreadhorde triggers, and your Martyr triggers. I'm gonna assume you give all of your guys another counter, I make an Zombie Army token from the Dreadhorde trigger and put two ctrs on it, and my Populace gets two ctrs.
Tamiyo's Epiphany, triggering my Channeler (I choose everyone I control who has ctrs) and Saheeli
Island
Duskmantle Operative
Done
Spidey: 14
Hand: 4
Battlefield:
(T) Plains
(T,U) Mt x2
(T,T) Swamp x2
(T,U) Island x2
(T) Forest
Kaya's Ghostform (When enchanted permanent dies or is put into exile, return that card to the battlefield under my control)
(U)
Spark Zombie (2/3; 3, Sac a creature or planeswalker: I gain 1 life and draw a card)
(U)
Rising Populace (
6/6 from ctrs; Whenever another creature or planewalker I control dies, put a +1/+1 ctr on ~) *4 +1/+1 ctr*
(T)
Goblin Assault Team (4/1; Haste; When ~ dies, put a +1/+1 ctr on target creature I control)
(T)
Herald of the Dreadhorde (
6/5 from ctrs; When ~ dies, amass 2
(Put two +1/+1 cts on an Army I control. If I don't control one, create a 0/0 black Zombie Army creature token first))
* 3 +1/+1 ctr* *Enchanted w/Ghostform*
(U)
Flux Channeler (2/2; Whenever I cast a noncreature spell, proliferate)
(U)
Saheeli, Sublime Artificer (Planeswalker, 5, Whenever I cast a noncreature spell, create a 1/1 colorless Servo artifact creature token.; -2: Target artifact I control becomes a copy of another target artifact or creature I control ueot, except it's an artifact in addition to its other types.) *4 loyalty ctrs*
(S)
Zombie Army creature token (
3/3 from ctrs) *3 +1/+1 ctrs*
(S) Servo artifact creature token (1/1)
(S)
Duskmantle Operative (2/2; ~ can't be blocked by creatures with power 4 or greater)
Graveyard:
Ajani's Pridemate ,
Teferi's Time Twist, Kaya's Ghostform, Tamiyo's Epiphany
Exile:
======================================================================================
Mooseman: 6
Hand: 5
Battlefield:
(T) Plains
(T) Swamp
(U) Island
(TU) Mountain x2
(TT) Forest
(U)
Charmed Stray (
3/3, Lifelink; ETB give each other ~ +1/+1 counter)
~2 +1/+1~
(T)
Sky Theater Strix (3/4 Flying. Whenever you cast a noncreature spell, Sky Theater Strix gets +1/+0 until end of turn.)~2 +1/+1~
(U)
Teyo's LightShield (0/3 When Teyo's Lightshield enters the battlefield, put a +1/+1 counter on target creature you control.)
(U)
Herald of the Dreadhorde (
5/4; When ~ dies, amass 2
(Put two +1/+1 cts on an Army I control. If I don't control one, create a 0/0 black Zombie Army creature token first))
~2 +1/+1~
(U)
Leyline Prowler (2/3 Deathtouch, lifelink. T: Add one mana of any color.)
Graveyard:
Goblin Assault Team, Domri's Ambush,
Kraul Stinger, Martyr for the Cause
Exile: