Lotus Keeper

At the beginning of your end step, if the number
of cards in your hand is equal to or greater than
your maximum hand size, create a Lotus artifact
token with "{t}, Sacrifice this artifact: Draw a
card and add one mana of any color."
{1}, {t}: Add one mana of any color. Until end of
turn, your maximum hand size is reduced by one.
"Dark memories for dark petals."
—Gardener mantra