Further Upgrades The first cards I'd pick up to further juice up the deck would be untapped mana-fixing lands: Watery Grave, Shipwreck Marsh, Underground River, Morphic Pool, Darkslick Shores, Polluted Delta, Sunken Ruins, Undercity Sewers, Urborg, Tomb of Yawgmoth and then maybe a couple more Island / Swamp fetches
When you absolutely positively need to kill all of one kind of thing this is your spell
Tutors In a 99-card singleton format, tutors are a powerful way to add consistency to your decks
What a time to be alive #10: Eureka While Eureka has never really enjoyed much tournament success, thats in large part due to only being printed in 1994 and never being legal during a time period in which creatures costing more than four were remotely good
And Planetarium even provides its own Scry ability if you have the spare mana to activate it