Maybe he thought he only had 4 lands?
Untap, Upkeep, Draw
Attack w/ Puca
Spidey: 15 14?
Hand: 3 (Island in hand)
Library: 40
In Play:
(T) Tundra (U/W dual)
(U,U,U) Island x4
(U) Blinkmoth Nexus (T: Add 1 to my mana pool. 1: ~ becomes a 1/1 Blinkmoth artifact creature w/flying ueot. It's still a land. 1, T: Target Blinkmoth creature gets +1/+1 ueot)
Legacy's Allure (At the beginning of my upkeep, I may put a treasure ctr on ~. Sac ~: Gain control of target creature with power less than or equal to the # of treasure ctrs on ~) *5 treasure ctr*
Limited Resources (When ~ CIP, each player chooses 5 lands he controls and sacs the rest. Players can't play lands if there are 10 or more lands in play)
(U) Mana Vault (~ doesn't untap during my untap step. At the beginning of my upkeep, I may pay 4. If I do, untap ~. At the beginning of my draw step, if ~ is tapped, ~ deals 1 dmg to me. T: Add 3 to my mana pool)
(U) Azorius Signet (1, T: Add UW to my mana pool)
Graveyard: Flooded Strand, Swords to Plowshares, Pearl Medallion, Foil, Overrule
RFG:
BigBlue: 20
Hand: 6
Library: 27
(U) Erratic Portal (1,T: Return target creature to it's owners hand unless it's controller pays 1)
(U) Mox Jet (T:B)
(UU) Island x2
(U) Salt Marsh (T: U or B; cip Tapped)
(U) Dimir Aqueduct (T: UB; cip stuff)
(U) Tainted Isle (T:1; T: U or B - playable only if I control a Swamp)
(T) Cemetary Puca (1/2; Whenever a creature goes to the GY from play, I may pay 1 to make ~ a copy of it w/ this ability)
Graveyard: Mind Twist, Memory Lapse, Island, River of Tears
RFG: Rootwater Diver