Three is largely unnecessary, as Mono-Red is well prepared for her
Double-sided foil cards are less prone to any sort of warping compared to single-sided foil cards
This is a card from the early days, when Wizards printed recklessly powerful gems in a sea of mediocre and obscure cards
The Standard format for this Eternal Brawl deck has been set by the deck itself: Return to Ravnica block/ Theros block/ Magic 2014 / Magic 2015 , when that format contained the most cards
In traditional Magic, or 1v1, you will make your opponent defend and you will attack it
For reference, the other five tokens in that Unglued group are the extremely common Red Goblin (29 sets, 14 unique art printings) and White Soldier (29 and 12), and the significantly less so Green Squirrel (4 and 4), White Pegasus (2 and 2), and Green Sheep (printed only the one time)