Mastery of the Tempest

If a source you control would deal damage
it deals that much damage plus 1.
Whenever a creature dies, if it was dealt
damage by a source you control this turn,
draw a card and untap a land you control
{1}{p/w}{p/u}{p/b}{p/r}{p/g}: Mastery of the Tempest
deals 1 damage to target player and each creature they control