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Use the second effect of Trickstar Light Stage intelligently it may be better, in some cases, to force the activation of a known trap like Altergeist Manifestation at a time when its less beneficial to your opponent than hitting a dead game one trap like Rivalry of Warlords

You can also unlock a secret pack by crafting a UR card, though it seems there may be some limitations on that

Even if there are several creatures that Cast Down cant target, there are even more that it can

requires one Tribute for Normal Summon, transforming it into a Level 5

In it you search for lost investigators, which coincidentally seems to tie into how the entire card game franchise builds upon itself by adding new investigator sets in each expansion release