Master of Life and Death

Sacrifice a creature: Add one mana of any color.

Whenever a creature enters, that creature's controller may have it deal damage equal to its power to any target of their choice.

Whenever another creature enters, you gain 1 life.

Whenever an artifact is put into a graveyard from the battlefield, you may have target opponent lose 1 life.

Whenever this creature or another artifact creature dies, you may untap target artifact.

Trample If damage would be dealt to another creature you control, prevent that damage. Put a +1/+1 counter on that creature for each 1 damage prevented this way. When Vigor is put into a graveyard from anywhere, shuffle it into its owner's library.

: Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)