Grass is good. The aim of the deck is to get to grass on your first turn, if you are able to use grass on your first turn, the game is pretty much over.
Aside from the obvious drawing mechanics, a good way to get grass into your hand is to use 'Spell Chronicle' with 'Patronus' in the GY. Banish 4 Witchcrafter spells and 1 Grass, use Patronus to return the 4 Witchcrafter spells and then pop Spell Chronicle on your next turn and have the opponent hand you Grass.
Witchcrafter Highlights
Version History:
29/03/2022: Remove 2x Spell Chronicle - Add 2x Secret Village of the Spellcasters
10/04/2022: Remove 2x Pot of Extravagance - Add 2x Kaiser Colosseum
10/04/2022: Remove 1x Pot of Acquisitiveness - Add 1x Terraforming
10/04/2022: Remove 2x Twin Twisters - Add 2x Called by the Grave