Untap, upkeep, draw.
Plains. Again.
Citadel Siege, choosing Khans. As I said, I got a number of good white cards...
Assuming no response since you're tapped out, I will initiate combat to get two +1/+1 counters on my Warrior.
I will then attack with the 5/3 warrior.
Block/response?
Spiderman: 20
Hand: 5
Library: 30
Battlefield:
(T,T,T) Plains x3
(S) Harvestguard Alseids (2/3; Enchantment Creature Nymph; Constellation — Whenever Harvestguard Alseids or another enchantment enters the battlefield under your control, prevent all damage that would be dealt to target creature this turn.)
Graveyard: Territorial Roc
Exile:
--------------------------------------------------
Rokapoke: 20
Hand: 4
Library: 34
Battlefield:
(TTT) Plains x3
(T) Swamp x1
Citadel Siege (Enchantment; As ~ enters the battlefield, choose Khans or Dragons. *Khans - At the beginning of combat on your turn, put two +1/+1 counters on target creature you control. *Dragons - At the beginning of combat on each opponent's turn, tap target creature that player controls.[/i])
(T) Dromoka Warrior (5/3 {3/1 base}; Human Warrior) ** 2 +1/+1 counters **
Graveyard: Ultimate Price
Exile: