- Use this card in combination with "Imperial Custom" to have an indestructible defensive monster.
- Use this card as fodder for a Tribute Summon.
- Use this card as fodder for a Rank 10 Xyz Monster.
- This card and "Exodius the Ultimate Forbidden Lord" can provide two material without using up your Normal Summon. If the Xyz Monster requires three materials (such as "Superdimensional Robot Galaxy Destroyer" or "Number 99: Utopic Dragon"), a "Timelord" or "Night Express Knight" can be Normal Summoned as the third material.
- This card can also cover the entire Tribute cost for a Level 10 or lower Ritual Monster, provided that the Ritual Monster is exactly Level 10, or can be searched out by "Pre-Preparation of Rites" (due to listing a specific Ritual Spell Card in its text).
- "Metal Reflect Slime" can be Tributed for "Metamorphosis" in order to Special Summon a powerful Level 10 Fusion Monster such as "Cyber End Dragon" or "Destiny End Dragoon".
|Japanese name||Primary type||Secondary type||Attribute||Type||Level/ Rank||ATK||DEF|
|Reactor Slime||リアクター・スライム||Effect Monster||WATER||Aqua||4||500||500|
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