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Because the draw trigger only fires at 7 or fewer, you want cards with immediate value, not cards you park in hand

It value deminishes in a format without heavy storm, but Karakuri has a higher chance to see it first turn, thanks to Pot of Duality and Karakuri Steel Shogun mdl 00X "Bureido" and Karakuri Anatomy

You may play lands from your hand

Each format has a particular item or items that the performers ask for and then a structure that makes use of the audience suggestions

If that target isn't legal as the triggered ability tries to resolve, it doesn't resolve and you don't scry

Magician's Circle X TRAP When a Spellcaster monster declares an attack: Each player Special Summons 1 Spellcaster monster with 2000 or less ATK from their Deck in Attack Position