RD Grass

Entertaining Grass
Level 8 FIRE Plant/Effect
0/0
[REQUIREMENT] None
[CONTINUOUS EFFECT] This card gains ATK equal to [the number of Level 1 Plant Type monsters in your Graveyard] x 1000. If you have 3 Level 1 Plant Type monsters with the same name in your Graveyard, this card inflicts piercing battle damage (if the ATK of the attacking monster exceeds the DEF of the attack target, inflict the difference), if it attacks a Defense Position monster.

(Note: Burst out laughing)

Touchable Grass
Trap Card
[REQUIREMENT] When an opponent's monster declares an attack.
[EFFECT] Special Summon 1 Level 1 Plant Type monster from your Graveyard face-up to your field in Defense Position. Then, if you Special Summoned a Normal Monster by this effect, you can negate that attack.

(Note: Daily reminder to touch grass)

Grass Ninja
Level 8 EARTH Plant/Fusion/Effect
2500/0
"Grass" + "Grass"
[REQUIREMENT] Shuffle up to 3 "Grass" from your Graveyard into the Deck.
[EFFECT] 1 face-up monster on your opponent's field loses ATK equal to [the number of "Grass" shuffled into the Deck to meet the requirement] x 1000 until the end of this turn.

Unavoidable Grass
Spell Card
[REQUIREMENT] None
[EFFECT] All face-up Level 1 Plant Type monsters on your field gain ATK equal to [the number of Level 1 Plant Type monsters on your field] x 1000 until the end of this turn.

(Note: 草不可避, meaning "hilarious", and 不可避 meaning "unavoidable").

Idle Grass
Level 1 EARTH Plant/Normal
0/0
Lol, brb gotta go.

Goodbye Grass
Level 1 EARTH Plant/Effect
0/0
[REQUIREMENT] During your Main Phase this card was Normal or Special Summoned.
[EFFECT] Set 1 "Laughing Grass" or 1 "Touchable Grass" from your Graveyard in your Spell & Trap Zone. This turn, you can only attack directly with Plant Type monsters.

(Note: This is a nod to "cya" slang.)

Friendly Grass
Level 1 EARTH Plant/Normal
0/0
Lol, gg my friend.

(Note: it's meant to be "gg", but "Good Grass" doesn't fit the cut, so...)

Joking Grass
Level 1 EARTH Plant/Effect
0/0
[REQUIREMENT] You Normal Summoned this card this turn and have a face-up Level 1 Plant Type Normal Monster on your field.
[EFFECT] Add 1 "Grass Weapon" or 1 "Stealthy Grass" from your Graveyard to your hand.

(Note: it's a nod to "jk" slang.)

Pwned Grass
Level 7 EARTH Plant/Effect
2500/1500
[REQUIREMENT] Send the top card of your Deck to the Graveyard.
[EFFECT] Inflict damage to your opponent equal to [the number of Level 1 Plant Type monsters in your Graveyard] x 300. Then, if you activated this effect during your Main Phase that you Normal or Special Summoned this card, you can destroy 1 Spell/Trap Card on your opponent's field.

(Note: it's a nod to "get pawned" phrase. Also, welcome back to edgy late 2000s-early 2010s.)

Cringy Grass
Level 1 EARTH Plant/Effect
0/0
[REQUIREMENT] Send 1 card from your hand to the Graveyard.
[EFFECT] This card gains 400 ATK until the end of this turn. Then, if you sent a Level 1 Plant Type monster to the Graveyard to meet the requirement, this face-up card can be treated as 2 Tributes for the Tribute Summon of a Plant Type monster in Attack Position this turn.

(Note: It's based off the "cringe" slang.)

Cancelled Grass
Spell Card
[REQUIREMENT] Send 1 card from your hand to the Graveyard.
[EFFECT] All face-up monsters on your opponent's field lose ATK equal to [the number of Level 1 Plant Type monsters on your field] x 1000 until the end of this turn.

(Note: It's based off the "get cancelled" slang.)

Stealthy Grass
Trap Card
[REQUIREMENT] When an opponent's monster declares an attack.
[EFFECT] Send the top 3 cards of your Deck to the Graveyard, then the attacking monster loses ATK equal to [the number of Level 1 Plant Type monsters sent to the Graveyard by this effect] x 500 until the end of this turn.

Grass Weapon
Equip Spell Card
[REQUIREMENT] Equip this card to 1 face-up Level 4 or lower Plant Type monster on your field.
[EFFECT] The equipped monster gains 300 ATK. If the equipped monster is a Level 1 monster, it can attack directly.

Grass Blade - Kusanagi
Equip Spell Card
[REQUIREMENT] Equip this card to 1 face-up Level 5 or higher Plant Type monster on your field.
[EFFECT] The equipped monster gains ATK equal to [the number of Level 1 Plant Type monsters in your Graveyard] x 100, and can attack twice per turn.

(Note: Name idea by DrawsyFox#9831 on Discord.)