Matilda, Unlife of the Party

Haste, Flying, Lifelink, Vigilance
Whenever Matilda, Unlife of the Party, deals
combat damage to a creature or player, you may
discard a card. If you do, Matilda deals damage
equal to that card's converted mana cost to
any target.
At the beginning of your end step, if you gained
seven or more life this turn, draw a card.