Yanfei, Law Unmatched

Whenever a permanent you control becomes the
target of a spell or ability cast or activated by an opponent, draw a card and deal 1 damage to that opponent.

At the beginning of each upkeep, choose a player. if
that player casts less than 4 spells this turn, you
draw a card. if that player casts 4 or more spells,
deal 4 damage to that player.