mimikyu v pokemon card value this PSA 10 card is the perfect way to showcase your collection. Mimikyu V - SWSH09: Brilliant

Use your instants when it makes the most sense to use them

The Twelfth Doctor I love the demonstrate mechanic, so I think very highly of The Twelfth Doctor, especially considering that most of reds card draw enables its ability due to the prevalence of impulse draws

Varchild, Betrayer of Kjeldor could be fun in some sort of group slug deck where you give your opponent tokens but in a harmful manner (maybe with something like Trespasser's Curse on the battlefield), although she might be better in the 99, since mono-red is pretty limiting

Better alternatives might include cards like Llanowar Elves for consistent early game ramp or Ghalta, Primal Hunger, which provides a more reliable threat for a similar mana cost