That's 4
Island
Sultai Emissary, triggering the Woe-Reaper so I'll exile your Archers and gain a life
Done
Spidey: 19
Hand: 9
Battlefield:
(U) Plains
(T,U) Island x2
(T) Swamp
(U) Mt
(U) Rugged Highlands (~ ETB tapped.; When ~ ETB, I gain 1 life.; T: Add R or G to my mana pool)
Temur Runemark (Enchanted creature gets +2/+2.; Enchanted creature has trample as long as I control a a blue or red permanent)
(U) Mardu Woe-Reaper (2/1; Whenever ~ or another Warrior ETB under my control, I may exile target creature card from a graveyard. If I do, I gain 1 life)
(T) Abzan Skycaptain (4/4 due to Runemark; Flying; When ~ dies, bolster 2 (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)) *Temur Runed*
(S) Sultai Emissary (1/1; When ~ dies, manifest the top card of my library)
Graveyard: Wild Slash
Exile;
=======================================================================
Mooseman: 17
Hand: 10
Battlefield:
(U) Plains
(T) Swamp
(UT) Mountain x2
(T) Forest
(U) Swiftwater Cliffs (ETB tapped, ETB gain 1 life. T: R or U)
(U) Ainok Guide (2/2, When ~ ETB Choose one- Put a +1/+1 counter on ~, Search library for a basic land reveal it, shuffle library, put the revealed land on top) ~+1/+1~
(U) Jeskai Sage (1/1, Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When Jeskai Sage dies, draw a card.)
Graveyard: Sultai Runemark
Exile: Archers of Qarsi