Liesa, Shroud of Dusk

Text:

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.

Rulings:

• 11/10/2020 Liesa’s first ability applies only to the “commander tax.” If there are any other additional costs to cast Liesa, those costs must be paid as normal.
• 11/10/2020 Liesa’s first ability isn’t optional. You can’t choose to pay mana to cover the “commander tax,” even if you have that mana available.
• 11/10/2020 Liesa’s last ability will resolve before the spell that caused it to trigger.