Dora, The Explorer

Vigilance, Haste, Reach, Menace
When Dora, The Explorer enters the battlefield, create a Map token, then create Boots, a
legendary 2/1 red Monkey creature token.
Backpack-Whenever Dora and/or Boots attacks,
they explore, then you may reveal your hand. If
you do, they gain +X/+X until end of turn,
where X is the number of land cards revealed
this way.