Second Expedition into Danger! — Ruling

Effetto 0

You can activate this face-down card, without activating its effect, at any time except during the Damage Step.

This card's effect that increases the ATK/DEF of a "Danger!" monster on your field by 500 starts a Chain. (It targets 1 face-up "Danger!" monster in your Monster Zone. Discarding a card is the cost to activate this effect.)
If you activate this effect during the Damage Step, it must be at the start of the Damage Step or before damage calculation. (If you activate this face-down card and this effect as part of the same Chain Link, you can activate this card during the Damage Step.)

This card's effect that places it on the bottom of your Deck and draws a card starts a Chain and activates in the Graveyard. (It does not target, and cannot be activated during the Damage Step. Discarding 1 "Danger!" monster from your hand is the cost to activate this effect.)
Placing this card on the bottom of the Deck and drawing 1 card do not happen simultaneously.