Panther Sage of Rakdos

You can only use one type of mana to cast Panther Sage of Rakdos.
If you used black mana to cast Panther Sage of Rakdos, it gains Wither and a +0/+1 counter. If you used red mana to cast Panther Sage of Rakdos, it gains Riot and a +1/+0 counter.