: Olivia Voldaren deals 1 damage to another target creature. That creature becomes a Vampire in addition to its other types. Put a +1/+1 counter on Olivia Voldaren.
: Gain control of target Vampire for as long as you control Olivia Voldaren.
Olivia Voldaren grows herself by pinging creatures, turning them into Vampires, then steals those Vampires (or any opposing Vampire) with her black ability to build a board out of your opponents' best creatures. You control the table through removal-on-a-stick early, snowball into a flying threat, and grind out card and board advantage while leaning on a Vampire tribal shell.
Repeatable removal and creature theft from the command zone, scaling with mana
Ping ability synergizes with infect/wither, deathtouch, and damage-payoff enablers
Stealing opposing Vampires lets you flip the strongest creatures to your side permanently
Self-growing flying threat that also functions as Voltron commander damage
Mana-hungry: every activation costs mana, so she's slow without ramp
Vulnerable to removal and the theft effect ends if she leaves the battlefield
Spot pings only deal 1 damage, so killing big creatures takes many activations or help
Two-color identity lacks blue counterspells/card draw and green ramp
Black ramp to fuel her expensive theft and repeated ping activations.
Add fast mana and rituals (Sol Ring, Arcane Signet, Ruby/Bojuka rocks, Cabal Coffers/Nirkana Revenant) so you can ping and steal in the same turn. Prioritize deathtouch enablers (Basilisk Collar, Gorgon Flail) and damage doublers to make her removal lethal, plus protection like Swiftfoot Boots and Heroic Intervention so theft doesn't unravel. To push higher, lean into a tighter Vampire/aristocrats package with strong tutors (Vampiric Tutor, Diabolic Intent) and a compact combo finish.