Echo essentially asks you to skip a turn, but Vanishing 3 gives you plenty of time to make use of a card, and it's an easy downside to work around too.
The archetype's reliance on recycling resources and building up to powerful Link monsters allows players to learn essential concepts such as resource management and strategic sequencing
However, compared to Dragons, Wyrm Decks often has further emphasis on the usage of banishing to either activating their effects or provide recursion
Depending on the Bloomburrow set's approach to its wolves, Ferocious Pup could help to round them out a bit
Wizards tested the waters with these in Dominaria United and they've proven to be a nice upgrade to the old frost effects, if for no other reason than the templating is just better
You can allow replays to get the player to get back to their starting rank, but I suggest that you teach the ranking system, as this one shows that you can lose to a challenger ten times, and then after you beat them once, you are all-of-a-sudden better than them