Irregularities can be detected, particularly in the set symbol and in lines that arent straight (see Print Quality and Straight Lines)
You need to commit more time to a game
While it might not seem the best to damage your own creatures, if they have any sort of abilities like enrage on Ripjaw Raptor, that ability triggers two times instead
3 Ulamog, The Infinite Gyre (Textured Foil) $228.92 The most valuable of the Eldrazi Titans can destroy any target permanent just for being cast, which while expensive makes it an excellent removal spell-come-devestarting-10/10-creature
This saw a bit of time in the red Standard decks of the day, although it fell off as Standard got more powerful
You can always "bracket decks up," meaning you can note that your deck meets the description of a Core (Bracket 2) deck but plays like an Upgraded (Bracket 3) deck, so you should bracket it at Bracket 3