B · Engine & Sequencing · §8
Sixteen shuffled units in thirty-nine cards — about three opening hands in five contain a natural two-Energy unit.
The Chosen Champion gives reliable access to a threat, but the shuffled unit count still matters.
P(≥1 shuffled unit in 4) = 1 − C(23,4) / C(39,4) ≈ 89.2%
Consequently, approximately 10.8% of initial hands contain no shuffled unit before the mulligan.
The shuffled deck contains eight two-Energy units: two Inferna, three Lonely Poro and three Mournful Witness.
P(≥1 two-Energy unit in 4) = 1 − C(31,4) / C(39,4) ≈ 61.8%
This is why the cleanest sideboard plans exchange Mask or Cleave for spells, exchange Inferna for Brynhir, add Ferrous while removing a spell, or switch Chosen Champion without changing the shuffled deck’s unit count at all.