Stitch, Experiment 626

Landfall -Whenever a land enters the battlefield under your control, reveal cards from the top of your library until you reveal a creature with mana cost less than or equal to Stitch's toughness.
Put all other cards revealed this way on the bottom
of your library.

If you control 6 or more lands, you may put that creature onto the battlefield under your control. Otherwise put that card into your hand.