Elturel Survivors — Battle for Baldur's Gate Promos #172s

Trample, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

As long as this creature is attacking, it gets +X/+0, where X is the number of lands defending player controls.