Zombie Master gives all Zombies the ability to regenerate themselves by paying a black mana as well as gives them swampwalk to make them impossible to block for some opponents
That was all a pretense to trick you into clicking on this link
Leyline of PunishmentLeyline of Punishment (5,937 Inclusions, 0% of 2,229,769 Decks) As the long-time pilot of a Sapling of ColfenorSapling of Colfenor deck, I can tell you that there are entire decks that just shut down when the phrase "players can't gain life" enters the chat, but most folks playing Leyline of PunishmentLeyline of Punishment aren't trying to shut you down so much as just keep things on an even playing field for their Group Slug shenanigans
Typically it is an odd kind of filler being part ramp and part threat you can use it in ramp decks to give you list greater depth
For one Colorless Energy, you can use Psyducks Headache attack, dealing a paltry ten damage but locking your opponent out of playing Supporter cards for their next turn