M15: Tribal effects

Magic 2015 has 11 cards with tribal effects: Obelisk of Urd, Belligerent Sliver, Constricting Sliver, Diffusion Sliver, Leeching Sliver, Venom Sliver, Sliver Hivelord, Preeminent Captain (Soldiers), Necromancer’s Stockpile (Zombies), Crucible of Fire (Dragons), and Goblin Rabblemaster (Goblins).

The first time I drafted Obelisk of Urd, I had a R/G deck that didn’t have more than 4 of any creature type. I was short on playables so I ended up running it. As might be expected, it never gave more than 1 creature +2/+2 and was underwhelming. The next time I drafted Obelisk of Urd, I had a B/r deck with 11 Zombies and the card was a beating and a half whenever it hit play. It was clear from these experiences that the value of Obelisk of Urd depends heavily on the colors you’re drafting. It was also clear that if Obelisk of Urd gives 2+ creatures in play +2/+2, you’re likely to win the game. Let’s take a look at all the tribes in Magic 2015 to determine which color combinations work best with Obelisk of Urd. While determining that, we will also look at which color combinations work best for the other tribal cards in Magic 2015.

This spreadsheet contains a summary of all the creatures in Magic 2015 (including Raise the Alarm, Triplicate Spirit, and Feral Incarnation). That information is summarized by creature type and rarity, with unplayable and sideboard-only cards excluded. The total column shows the expected number of playable/TBD creatures of that creature type in a typical draft.

Looking at this, there are 8 tribes that are expected to have 8+ representatives in an average 8-person draft:

  • Humans are spread across all 5 colors, but W/U, R/W, and U/R have access to the most number of playable ones: 13.5, 12.6, and 11.1 respectively.
  • Elementals are spread across blue, red, and green. G/U has access to 12.2, U/R has access to 11.9, and R/G has access to 9.9.
  • Warriors are almost entirely in red, which has 8.8 in a typical draft.
  • Goblins are entirely in red, with 11.2 in a typical draft.
  • Soldiers are entirely in white, with 10.2 in a typical draft. Note that while Raise the Alarm doesn’t combo with Preeminent Captain, it combos really well with Obelisk of Urd, allowing you to cast it earlier and turn your 1/1’s into 3/3’s. (Similarly, while there are only an average of 6 Spirits in a typical draft, Obelisk of Urd can be absurd with Triplicate Spirits.)
  • Zombies are entirely in black, with 9.8 in a typical draft.
  • Walls are spread across all 5 colors, and no color combination has more than 6.
  • Cats are spread across white, blue, and black, and no color combination has more than 6.

Given these numbers, it seems that most color combinations can make good use of Obelisk of Urd if you draft it early and know what creature types to start drafting once you’ve drafted it. Red provides access to the most options.

  • White: Soldiers (W/X) or Humans (W/U or R/W)
  • Blue: Humans (W/U or U/R) or Elementals (G/U or U/R), so only U/B doesn’t work
  • Black: Zombies (B/X)
  • Red: Warriors (R/X), Goblins (R/X), Humans (R/W or U/R), or Elementals (U/R or R/G)
  • Green: Elementals (G/U or R/G), so only B/G and G/W don’t work

From this, it appears that Preeminent Captain, Necromancer’s Stockpile, and Goblin Rabblemaster have the potential to be good in their respective colors. On the other hand, there are only 2 Dragons in Magic 2015, both at rare, plus Brood Keeper, so Crucible of Fire is unplayable. Also, the set only has 5 playable/TBD Slivers (I don’t consider Sliver Hivelord playable in most decks), all at uncommon, so an 8-person draft will have an average of 4.5 Slivers. Constricting Sliver, Belligerent Sliver, and Venom Sliver are good on their own, but Diffusion Sliver and Leeching Sliver are unplayable.

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