Rather than pay for each previous time you've cast this spell from the command zone this game, pay 2 life that many times.
Flying, lifelink
Whenever a player casts a spell, they lose 2 life.
Liesa is a 4/5 flying lifelinker that taxes every spell cast by 2 life, gaining you life back through lifelink while bleeding opponents dry. The deck plays an attrition/aristocrats game—drain opponents incrementally with the static ability, amplify life loss, then flip your massive accumulated lifegain into a win. You stabilize early, grind midgame value, and close with a burst payoff or wide flying beats.
Liesa's tax punishes spell-heavy and combo-reliant tables, slowing opponents every turn
Cheap commander-tax dodge—pay life instead of mana means she recasts easily
Built-in lifegain via lifelink fuels life-payment effects and stabilizes against aggro
Synergizes naturally with life-loss/drain payoffs and aristocrats lines
The static life loss is symmetric—you also lose 2 life on each of your spells
Bleeding opponents 2 at a time is slow without amplifiers; can feel passive
Vulnerable to mass removal and being ignored on durdly tables
No card advantage engine built in; relies on supporting pieces
Legendary Creature — Angel
for each previous time you've cast this spell from the command zone this game, pay 2 life that many times.