Authority: Community discussion
Official ruling confirmed: unknown
Source: Reddit: r/Yugioh101
Format: TCG
Status: resolved

Related: https://duelpedia.com/2026/09/12/what-counts-as-being-destroyed-by-a-game-mechanic/

1. Question

A Reddit user asked about an interaction involving Giant Rat and Adhesion Trap Hole.

The scenario involves Giant Rat being destroyed by battle and activating its effect during the Damage Step to Special Summon another monster. The question was whether Adhesion Trap Hole could then be chained to that Special Summon to halve the ATK of the summoned monster.

The user understood that some ATK-modifying effects, such as the interaction involving Limiter Removal, can be activated during the Damage Step and therefore wondered why an ATK-halving Trap could not be used in the same situation.

2. Reddit Discussion

The Reddit discussion focused on the special restrictions that apply to card and effect activations during the Damage Step.

The main answer was that Adhesion Trap Hole cannot be activated at any point during the Damage Step. This means the problem is not simply that Giant Rat’s effect Special Summons a monster at a particular point in the Damage Step. Adhesion Trap Hole itself is not permitted to activate during the Damage Step.

The discussion also clarified an important distinction concerning Giant Rat. Giant Rat is destroyed by battle during the After Damage Calculation portion of the Damage Step, but its effect activates later, during the End of the Damage Step.

This means that the Special Summon can occur during the End of the Damage Step. Special Summoning a monster is not itself impossible during that part of the Damage Step; the problem is that Adhesion Trap Hole is not an effect that can be activated during the Damage Step. One commenter gave another monster effect as an example showing that Special Summons can occur during this period.

The discussion further explained that ATK/DEF-modifying effects have a limited window during the Damage Step. According to the Reddit explanations, these effects can generally be activated before the Damage Calculation substep, but not from Damage Calculation onward.

Therefore, the fact that an effect changes ATK does not automatically mean every ATK-changing card can be activated during every part of the Damage Step.

3. Summary of the Reddit Answer

Interpretation	Result
Giant Rat is destroyed by battle	This occurs during After Damage Calculation
Giant Rat’s effect activates	It activates during the End of the Damage Step
Giant Rat can Special Summon a monster then	Yes
Adhesion Trap Hole can be activated during the Damage Step	No
ATK/DEF-changing effects during the Damage Step	Subject to the Damage Step’s activation restrictions
ATK/DEF-changing effects after Damage Calculation begins	Generally cannot be activated

The key distinction is between what can happen during the Damage Step and what effects can be activated during the Damage Step.

A monster can be Special Summoned during the End of the Damage Step without making every card that could normally respond to that Summon activatable. Adhesion Trap Hole remains unavailable because it cannot be activated during the Damage Step.

The Reddit discussion also corrected the terminology surrounding Giant Rat: its destruction by battle is treated during After Damage Calculation, while its effect activates during the End of the Damage Step.

4. Conclusion

Adhesion Trap Hole cannot be activated during the Damage Step.

In the Giant Rat example, Giant Rat is destroyed by battle during After Damage Calculation, and its effect subsequently activates during the End of the Damage Step to Special Summon another monster.

Although Special Summons can occur during the Damage Step, that does not mean that every card capable of responding to a Special Summon can be activated at that time.

The important rule to remember is:

The Damage Step has special activation restrictions, and those restrictions continue to apply even when another effect Special Summons a monster during the Damage Step.

ATK/DEF-modifying effects have their own restricted activation window, generally ending once Damage Calculation begins. Adhesion Trap Hole, however, cannot be activated during the Damage Step at all.

This Reddit discussion provides a community explanation of the interaction. It should not be treated as an independent official Konami ruling unless supported by an official Konami source.

Date: 11 September 2026

Source: https://www.reddit.com/r/Yugioh101/comments/1wd4ouy/ruling_question_adhesion_trap_hole/