Advanced format ruling
Underground Arachnid

Card effect (current official text)1 DARK Tuner + 1 non-Tuner Insect-Type monster
If this card attacks, your opponent cannot activate any Spell or Trap Cards until the end of the Damage Step. Once per turn, you can select 1 face-up monster your opponent controls, and equip it to this card. If this card would be destroyed by battle, you can destroy the monster equipped to this card by its effect instead. (You can only equip 1 monster at a time to this card.)
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.