Your commander is also a 7/7, and thats awesome with small commanders like Rograkh, Son of Rohgahh
Playing lots of Locations can produce huge amounts of passive lore gain, enable powerful effects, and synergies
There are only twenty or so effects to choose from, so mostly it's a matter of narrowing down what works best, both for this color combination and in conjunction with one another
Glenn draws cards equal to the power it had when it dealt damage
Ungraded versions of the Charizard ex Special now sell on average for $55
Cantrips like Serum Visions, permanents with ETBs like Witching Well, Momo, Playful Pet, and Dream Beavers, begin to feel like full advantages with enough scry payoffs in the deck