Cards like Adeline, Resplendent Cathar and Anim Pakal, Thousandth Moon easily rack up melee triggers in addition to exploiting the additional combat
One might even venture (Im thinking about it), that for early Magic, world-building was primarily about providing a usable and attractive user-interface for a rules system
Just getting something with a useful energy ETB is often enough to really start rolling, as even copying a Conduit Goblin nets you 4 energy
However it also doubles as turn 1 ramp with Dryad Arbor
Pull rate from Regular Packs: 2.92% The estimated pull rate for Tangrowth (Pulsing Aura) from a Regular Pack is approximately 2.92%, meaning you might need to open around 35 Regular Packs to obtain it
On top of that, tapping 12 powers worth of creatures is pretty tough for most decks