Baba Denata, Demophage

Lifelink
Whenever the Triggered ability of another
warlock creature you control causes you to
lose life create a X/X Demon Pest creature token
where X is the life lost this way. Then lose 2 life.
This ability triggers only once each turn.
{b}{b}{t}, Sacrifice another creature:
Gain X life where X is its toughness.
Activate this ability only once each turn.