You have 51 cards in library (started with 53, -1 for draw, -1 for Bomat), right? And Evolving Wilds on the battlefield? And four cards in hand (started with 6, -1 Evolving Wilds, -1 Bomat Courier)?
Untap, upkeep, Draw
Forest
Longtusk Cub
Done
Spidey: 19
Hand: 5
Library: 51
Battlefield...