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Saffi Eriksdotter and Karmic Guide can start your list, but low-power, high-value cards like Blood Artist, Suture Priest, and Duplicant make the cut

These always take the form of creatures you control get +X/+X. The most common buff is +1/+1, but this can include anything from +1/+0 to +5/+5 and beyond

Instant and sorcery spells you cast cost less to cast, where X is Vadrik's power

Most also fill in niches or double up other effects Commander decks want ample access to

Unite the Coalition Brokers Confluence wishes it could be Unite the Coalition: a 5-color card that can protect your permanents but offers a host of other powerful abilities that dont limit its usage