Legendary horrors, nightmares, demons, and spirits are a good place to start, followed by anything from Magic sets that take place on planes like Innistrad and Duskmourn
You choose to untap or tap each of them
Here are the cards you need for 'Triumphant Light Museum 2': Leafeon ex #91 (Rainbow / Two Gold Star) Glaceon ex #92 (Rainbow / Two Gold Star) Garchomp ex #93 (Rainbow / Two Gold Star) Probopass ex #94 (Rainbow / Two Gold Star) Rewards: 36 Wonder Hourglasses, 12 Pack Hourglasses and 10 Shop Tickets
Note that this works for when any creature attacks, not just yours, so when someone attacks you and triggers a defensive card you also net the trigger twice, so you could play this in a Pillow Fort deck build around things like Cunning Rhetoric and Search the Premises
Cleland-Hura Determining whether a card is bad or not can be tricky
Mystic Remora ($9.48) Mystic Remora is an incredible draw spell that is on par with cards that are far more expensive