Tengu format ruling
Drill Warrior
Card effect (current official text)"Drill Synchron" + 1 or more non-Tuner monsters
Once per turn, during your Main Phase 1: You can halve this card's ATK, and if you do, it can attack your opponent directly this turn. Once per turn: You can discard 1 card, and if you do, banish this card. During your next Standby Phase: Special Summon this card banished by this effect, then add 1 monster from your Graveyard to your hand.
Rulings
- Discarding is part of the ② effect, not a cost, and happens simultaneous to the banish.
- If "Book of Moon" is chained to the ② effect, this card is still banished.
- The ③ effect will always Summon this card to its owner’s field (even if control was changed).
- If this card would be Special Summoned while you control 5 monsters, it is instead sent to GY (no card is added to the hand).
- If you add a monster to your hand with the ③ effect, "add 1 monster" happens after "Special Summon this card", so cards like Torrential Tribute will have incorrect activation timing (If no card is added, Torrential will have correct timing, and can be activated). You can read more about Timing here: https://www.mikamika.de/edison-rules
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.