Tax evasion is nothing but legitimate self-defense against the theft that is tax collection.
As stated in its TYPELINE, Blood Crypt is a Swamp.And Farseek is looking for a Swamp, which is a card with the SUBTYPE «Swamp» (not a card named Swamp)109.2. If a spell or ability uses a description of an object that includes a card type or subtype, but doesn’t include the word “card,” “spell,” “source,” or “scheme,” it means a permanent of that card type or subtype on the battlefield.109.2a If a spell or ability uses a description of an object that includes the word “card” and the name of a zone, it means a card matching that description in the stated zone. 205.3i Lands have their own unique set of subtypes; these subtypes are called land types. The land types are Desert, Forest, Gate, Island, Lair, Locus, Mine, Mountain, Plains, Power-Plant, Swamp, Tower, and Urza’s.