Back before the timing rules were ironed out, the powerful Legends
card Land Tax
had an activated ability instead of a triggered one. If you and your opponent each had four lands, you could use a Strip Mine
on one of his, and then respond to your own effect by activating Land Tax.
That no longer works, but you can simulate it with the new "Land Tax on Legs," Weathered Wayfarer. Image this: You go first, and play a plains and a Wayfarer. Your opponent lays a land and passes. On your second turn, you play a new fetch land, such as a Flooded Strand, and pass. Your opponent plays his second land and passes. Now you get all tricky. Sacrifice the Strand to search for an island or plains, but don't let it resolve just yet. Respond by tapping your plains and activating your Wayfarer.
Does that work? Yes. You have one land in play to your opponent's two; your Strand is in the graveyard with its ability on the stack waiting to resolve. Free land!
And the best part? You can get another
fetch land with the Wayfarer, and repeat the process for another three turns or more!