A · Fundamentals · §6
Keep a functional sequence, not isolated powerful cards. Almost every hand has units, so the mulligan is about curve shape.
The mulligan should look for a functional sequence rather than for good cards. A keepable opener normally has an early body, a three or four-Energy payoff, and a tactical bridge: Ambush, card flow, Legion, Thrill, or interaction.
Early body plus plus a second unit is the default card-flow hand. The early body establishes presence, and the second unit or the Legend trigger gets Kinkou to its five-Might condition, so the deck keeps deploying without emptying its hand.
plus another meaningful body gives you a permanent buff and a temporary allocation from one card, and they can be combined at one battlefield or divided across two.◆src
Any cheap card plus is the highest Might per Energy the deck produces. It is strongest when the first card is a unit, because then the sequence generates two Legend triggers and six or more printed Might for very little Energy.◆src
Early body plus or on the draw lets you establish a battlefield while keeping a reaction-speed unit for their development. Inferna is best when you already control a unit at the relevant battlefield; Nidalee is best when the combat can actually be won, which turns the Ambush into tempo and a card.
A value unit plus is keepable when the hand already holds something worth replaying: , , , Brynhir in a slower matchup, or an Accelerate unit you can afford to replay ready. Thrill without an appropriate target is a speculative keep.
One two-Energy unit, one three-Energy unit, or , and one interactive spell is usually fine even with no Kinkou and no Thrill. The list is dense enough that the following draws are very likely to be units, so you do not need to mulligan every hand that lacks a named engine.
Prioritise , , , Kinkou with a threshold plan, sequences, pressure, and hands that can establish the first battlefield without spending . You are more willing to keep proactive units and less willing to keep .
Prioritise , , Trophy Hunter access, against small-unit decks, multiple bodies, and a hand that can contest their first scoring lane without surrendering the second. You are less willing to keep a purely proactive hand that cannot respond to their first commitment.