Tengu format ruling
Raging Mad Plants
Card effect (current official text)All Plant-Type monsters you currently control gain 300 ATK for each Plant-Type monster currently in your Graveyard, until the end of this turn. During the End Phase, destroy all Plant-Type monsters you control.
Rulings
- You must have at least 1 Plant-Type monster in your GY in order to activate this card. The ATK increase is locked-in when this card resolves. The ATK increase will not change if the number of Plant-Type monsters in your GY changes after this card resolves. The ATK increase will not apply to Plant-Type monsters Summoned after this card resolves. The effect to destroy all face-up Plant-Type monsters you control will apply to monsters Summoned after this card resolves. You can activate "Raging Mad Plants" during the Damage Step. The effect to destroy all face-up Plant-Type monsters you control does not start a Chain.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.