Whenever a creature you control explores a land card, you may put a land card from your hand onto the battlefield tapped.
Whenever a creature you control explores a nonland card, put a +1/+1 counter on Nicanzil.
Nicanzil turns explore triggers into ramp and counters, letting you flood the board with extra lands and grow into a threat. You play a critical mass of explore creatures and effects, deploy lands from hand for free, then convert that mana advantage into a big board or commander damage.
Repeatable land ramp that accelerates you ahead of the table
Self-growing commander that becomes a real clock or Voltron threat
Synergizes with landfall payoffs since you drop extra lands
Cheap 2-mana commander that comes down early and works all game
Heavily dependent on assembling enough explore creatures to be relevant
Explore is random; nonland reveals don't ramp and land reveals don't grow Nicanzil
Removing Nicanzil shuts off the +1/+1 counter half and any Voltron plan
Lacks built-in card advantage or interaction outside of explore effects
Vulnerable to land-drop hate and floods you with lands you may not need