Oblivion Sower and Blight Herder are good against delve and various spot removal
The convenient thing about this is it's pretty strongly hybridizable with the above All Cards Matter deck type, so you can use these cards as a slight pull of your one-for-one decks toward the lands theme or to define another, often blurrily separated archetype
If you're a Markov admirer, by the way, you might enjoy our piece on how he'd fare in a cage match with other big name pop culture vampires
For now, I wouldnt recommend getting in on the card at $5
Toxic looks to be gated at one poison counter per instance of combat damage, unless the number scales up on other creatures
Blue is a color that embodies knowledge, and drawing cards is equivalent to having more knowledge at your disposal