REDU format ruling
Calming Magic

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)This card can only be activated at the start of Main Phase 1. During the Main Phases and Battle Phase of this turn, neither player can Summon monsters.
Rulings
- While "Calming Magic" is active, if an effect like "Giant Germ" triggers, you inflict damage but do not Special Summon.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.