Pricing these types of cards is really tricky too, so you end up in a situation where you dont know what the price of something should be - and it is going to take maybe months to find a buyer who can tell you what that price is
Tyvar's Stand Giving your creature hexproof and indestructible makes for a fantastic combat trick
So long as you're playing with a bunch of cards with good enter-the-battlefield triggers, like Skyclave Apparition, Agent of Treachery, and Deadeye Navigator, you can rinse and repeat until you've taken over the game
The earlier Once Upon a Time is banned in as many formats as possible, the sooner we can stop talking about banning it and maybe get back to a place where we dont expect bans, and the better gameplay will be
These next cards, however, are the worst of the worst