Gaelrider Titan

{r}{u}: Draw a card. Gaelrider Titan gets +2/+X until end of turn, where X is the cost of the card. If it is a land card, Gaelrider Titan gets -2/+4 until end of turn.
In Ravnica, Gaelrider Titans exist in the pipes of Ravnica, fixing leaks and problems with the water system, but they also fight any crooks or robbers that try to mess up the pipes.