There are other anthems that should of course go in, but this would be my top option
Very few Basic cards have this much power, so this Latias EX is a fantastic option you just cant go wrong with
Counterspells are most common in blue, and less common (and generally less powerful) in white and green
This is a fun way for kids to demonstrate knowledge of historical figures, characters in a novel you studied, Greek mythology, animals (the possibilities are endless!)
Lords like this play double duty in typal decks
The key component to this is that Legolass Quick Reflexes has split second, making it so long as it is on the stack, no one can cast spells or active abilities in response unless that ability produces mana