Karn, the Great Abrador (Modern)

The deck wants to turn the lands our opppnents control into artifacts with Myr Landshaper and Liquimetal Coating and then destroy them with extremely efficient artifact removal. For that we have Abrade which also acts as potential creature removal, Shattering Spree which can kill as many lands at once as our mana allows it and Karn, the Great Creator, who turns the artifact lands into 0/0 creatures with his +1, causing them to die.

As we need quite a setup before starting to kill the opponents lands, we got Day of Judgment and Wrath of Gods for a total of 7 board wipes. For more targeted removal, besides Abrade, we have Lightning Bolt and the -2 of Ajani Vengeant, which also gains us life, offsetting the life loss of our pain land. For card draw and potential burn we have Browbeat.

We have 25 lands, reasonable with our average converted mana cost.

As we have a playset of Karn, the Great Creator, we can cheat on threat density and simply put our win-condition into the sideboard which we did with two copies of Darksteel Colossus. I could have taken Blightsteel Colossus instead but that would have been way too expensive. As we are able to access our sideboard with Karn, the Great Creator, we packed a bunch of silverbullets:
Three times Tormod's Crypt and one copy of Grafdigger's Cage for graveyard hate. Against mill we have two copies of Cranial Archive. For tron we got a Damping Sphere.
If we happen to play against a bunch of Planeswalkers, we have two copies of Sorcerous Spyglass.
Against burn or infect we also play two copies of Spellskite.
Karn, the Great creator can also function as a tutor for our Landshaper Myr of which we also put two copies into the sideboard, in case we want to access it quickly.

The deck is quite budget for modern, not even costing 100€ including the sideboard.