Venomsac Lagac

Deathtouch on a 2/1 already makes for a favorable combat trade: the low toughness barely matters when the creature kills whatever it touches. The Mount frame flips that defensive posture into an offensive one. Saddle asks you to tap two power's worth of other creatures before combat, and in exchange the attacking body gets +0/+3, so it swings as a 2/4 that still carries deathtouch. That toughness bump does real work: it lets the lizard attack into blockers that would trade evenly with a bare 2/1, forcing opponents to choose between chumping and handing over a creature to the deathtouch. The saddle cost is the balancing pressure, demanding enough other bodies to spare two power on a turn they will not be attacking, which is exactly the tax that keeps a two-drop with this much combat reach from being oppressive. Green has long used deathtouch as an equalizer that makes small creatures dangerous; grafting it onto the tap-to-empower structure Mounts share means the reward scales with how developed the board already is rather than arriving for free on turn two.