Spire of Industry for another City of Brass clone? Remove a Plains.

For Basalt Monolith: remove one of the worse colorless rocks.
For Villainous Wealth: remove Grand Abolisher

For Swan Song: ???
For Arcane Denial: ???
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Do I want like 1-3 counter spells? I don't want to get Shatterstormed or something. Nonbo with Defense Grid but might be worth.

!!! Swan Song (great for everything except creatures and artifacts)
!!! Arcane Denial (worth it when shit's going down)
Memory Lapse (essentially a Time Walk sometimes)
Counterspell (does double blue work?)
Disallow (very versatile, expensive as hell, double blue)
Forbid (reusable, expensive as hell, double blue)
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French EDH

OUT: Mana Vault, Sensei's Divining Top, Sol Ring, Strip Mine, Ichor Rats, Merciless Eviction

IN: Rishadan Port, Thoughtseize, Inquisition of Kozilek, Hymn to Tourach, Duress, Pithing Needle