Bjorna, Nightfall Alchemist [Secret Lair: Universes Within] Human Mutant and only Alrund can capture

and only Alrund can capture them

"I do not wish to speak with you

−3: Destroy target permanent that's one or more colors

Set: March of the Machine Type: Instant Rarity: Common Cost: {G} Target creature gets +2/+2 and gains reach until end of turn

Bjorna, Nightfall Alchemist [Secret Lair: Universes Within] Human Mutant and only Alrund can captureSet: Secret Lair: Universes Within Type: Legendary Creature Human Rarity: Rare Cost: {U}{R} {T}, Sacrifice an artifact: Bjorna, Nightfall Alchemist deals 1 damage to target creature. Goad that creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) Friends forever (You can have two commanders if both have friends forever.) (=SLD 344)