If you have 6 mana worth of Elf mana generation and Rhys in play, you can double your token count twice per turn
I wish we had fractional mana, because all of these cards would be really useful if the difference between the in-the-hand spell and what it is inspired by was 1/2 mana
Ravnican Shock Lands The shock lands remain just about the best lands in MTG and any reprint is a banner event
The Un-Sets, imo, are really something that ought to be kept around as they offer freedom, creativity and forward/very forward thinking
Every time something returns from a graveyard, your board grows bigger to overwhelm opponents quickly with both value and power
Infestation and Attunement are only efficient and effective if you can really fuel them, otherwise you would be far better off with a standard Merfolk Looter