Wolf generating: The most simple Wolf generating cards are Master of the Wild Hunt and Garruk Relentless which generate a wolf token every turn and Wren's Run Packmaster which generates even more if you have some mana left
This combination has proven useful enough to be played in multiple decks in Modern Jeskai Breach, Esper Turns, UR Murktide, Grixis Shadow, and Arclight Phoenix
Most of reds best cards are burn which does make it a slightly narrower colour in some respects
Delve Rules A keyword ability that lets you exile cards from your graveyard rather than pay generic mana to cast a spell
As of the time of publishing, if players pull the card in a set, they're greeted with a blank, artwork-free card that simply says "New art coming soon." Attempting to play the immersive animation for the card sees players greeted with silence and a black screen for a few seconds, before the placeholder card is displayed again.
Repeal 15