Its the ideal card to sacrifice or discard, but the surveil effect means its also just fine to cast when you need to commit to the board
You could keep it simple, with cards that have great enters triggers like Hornet Queen, or take advantage of cards like Kairi, the Swirling Sky that are balanced by the legend rule
Despite all her upsides, however, Myrel does have one clear weakness: she must attack to jumpstart her army
This means that Charizard can easily knock out powerful opponents with a single hit, before ever taking a single hit of damage itself
The implied plan is clear, include a bunch of blight cards in your deck that put counters on your cards, and then gradually burn the opponent down with tarfire damage turn by turn