A circle means a common card, a diamond means semi-rare and a star is rare
Conversely, if a Flip Summon or the Normal Summon of a Gemini monster already on the field is negated, that monster is considered to have been on the field
If you have enough resources, you can obtain knowledge +3 correction value, and if you do not have resources, you can also discover one additional clue
They read, Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control. That means you can attack in multiple ways, and as long as youre interfering with your opponents hand and board state, youll benefit massively from it
monsters people recognize immediately