mtg 2015 core set cards Magic The Gathering (MTG / M15 Intro Pack / Theme Deck Magic the GatheringM15 2015 Core Set expansion Magic 2015 Core Set (m15):

The news comes via Wizards of the Coast's own Blake Rasmussen, who posted an announcement to the official Magic: The Gathering website on Apr

Tempo decks tend to stick smaller threats that can snowball over time, while spending the rest of their resources on stopping another deck getting enough momentum to seize the tempo advantage for themselves

This isnt to say Relentless Rats has no merit

I dont think theres a huge need to cast Radiant Flames out of the sideboard for three so Im not playing a third color of mana, but if there is a good reason, you could get by shaving a Forest for a Canopy Vista which is fetchable by all of the lands

And as such will see play

These appear in both non-foil and traditional foil only in Collector Boosters