REDU format ruling
Magic Hole Golem

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Once per turn, you can select 1 face-up monster you control. Its ATK is halved until the End Phase, and it can attack your opponent directly this turn. During the turn you activate this effect, only the selected monster can attack.
Rulings
- This effect targets 1 face-up monster you control.
- If you use "Shrink" on a monster whose ATK is halved by "Magic Hole Golem" the ATK becomes half of its original ATK. After "Shrink" is no longer applied, the ATK becomes the same as before "Magical Hole Golem" was activated.
- If you control 2 "Magic Hole Golems" and target different monsters with their effects, neither monster can attack.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.