Bringing back the foil loophole and increasing the supply of Reserved List cards through Masters sets, Secret Lairs , and other "premium" supplemental products would be a win for both Wizards and players and likely not as bad for collectors as some would like you to believe
The ward cost also makes it hard to deal with in lower-powered formats with less removal
For this reason, you get the rule 903.8, colloquially known as the commander tax. History of the Commander Tax The commander tax has existed ever since the formats inception back in 1996
The Standard Elsa card only costs $0.26, which is an insane value difference.
Flying as a mechanic went from this card cant be blocked except by other creatures with flying to this card cant be blocked except by other creatures with flying or reach. Portal: Three Kingdoms being a one-off starter set, didnt have any creatures specifically designed to counter horsemanship
You can use Trigger Happy to cause abilities to trigger at unusual times