Ichor Rats not only has infect, it also gives your opponents a poison counter as soon as it hits the battlefield
What I was not in the market for was a land that pings me for a life, sacrifices itself immediately, and grabs me a land that I probably could've just avoided altogether in my mono-color deck
Like most Magic: The Gathering cards, the value of The Darkness Crystal depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy)
Of course, Anara's indestructible applies to itself if it is in fact one of your commanders, where it'll also protect your partner of choice
Flavor 4
If you want instant venturing, look no further than Veteran Dungeoneer