
Instant
As an additional cost to cast this spell, sacrifice a land.
Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Green ramp fetching two basics, one to battlefield, instant-speed alternative role.

Similar two-basic ramp spell putting one onto battlefield, sorcery upgrade.

Nearly identical: sacrifice land, fetch two basics at instant speed.

Creature version fetching two basics onto battlefield, with sac land.

Fetches two lands untapped, premium green ramp.

Sorcery fetching two basics tapped, classic ramp.

Cycling-enabled ramp fetching two basics tapped.

Cheap green ramp fetching a land untapped onto battlefield.
The two lands do not count toward your normal one land you can play each turn.
The sacrifice of a land is part of the cost of casting Harrow. You can't pay this cost more than once to get a multiple effect.