Vexing Radgull Unless you care about radiation counters specifically, Vexing Radgull is actually a less reliable source of proliferation than Thrummingbird
First, the champion, playing Mono-Black Necro Control: Creatures (7) Lands (23) Spells (30) 4 Nevinyrral's Disk 1 Hymn to Tourach 4 Necropotence 1 Ivory Tower 4 Dark Ritual 4 Drain Life 3 Stupor 2 Mind Warp 3 Contagion 1 Serrated Arrows 2 Demonic Consultation 1 Zuran Orb Sideboard Then, in third place, representing the aggro decks of the format, Brian Hackers Bad Moon Necro: Creatures (19) Lands (21) Spells (20) And then finally carrying on the fine tradition of B/r Necro-decks, Chris Pikula, who actually increased the red presence in the deck with Incinerates and multiple maindeck Shatters (Winter Orb, Howling Mine, Serrated Arrows, even Black Vise, Ivory Tower, and Zuran Orb were worthy targets)
This was enough to quickly push the price of Jwari Shapeshifter from $0.53 to $7.40
There are enough vehicles that either represent pirate ships or that synergize with Treasure tokens, so its a fairly natural fit
He's also a rare out of Mirrodin (though fans recently voted him into Tenth Edition , so you'll be seeing him around for a while)
Dont want to dig for haste