Lizards are a creature type that gained substantial typal support in Bloomburrow, particularly in black and red. Those Lizards frequently care about opponents losing life during your turn and reward maintaining constant pressure.
Iridescent Vinelasher can repeatedly drain opponents as lands enter, while Valley Flamecaller increases noncombat damage from your Lizards and other qualifying creatures. Older Lizards such as Rootwalla and Plated Rootwalla give the tribe a much longer history.
