Remember, expend counts the mana spent to cast things, not activated abilities, so load up on instants to cast on other players turns
Combine this with any number of other cards on this list, and you could quite easily whittle a foe down to zero life after a few attacks or some token-generating shenanigans
But these two are Bant counters creatures, and while they work really well together, I want to talk about their decks and what people are going to play
I will certainly play it to find out if it has the problems that I suggested it might
This list covers only the main setsorry, no Jumpstart extras like [[The Cabbage Merchant]] (amazing in cEDH by the way) or stunning alt-art reprints like [[Mystic Remora]]
You can also get Rare cards in 'Parallel Foil Cards'