Netherwing, Lifes Bloom

Flying, Lifelink
When you lose life Netherwing gets +1/+0 for each 1 life lost this way.
Pay 100 life and sacrifice Netherwing. Each player takes damage equal to life lost this turn.
Memosprite-Castorice: This card is placed in the command zone and command tax is applied. Netherwing can only remain on the field as long as Castorice is on the field and is not considered a Commander.