Prime Dune-Brood

Menace, trample, first strike
Prime Dune-Brood gets +1/+0 for each land you
control.
Whenever Prime Dune-Brood deals damage to a
player, create that many 1/1 white, black, red,
and green Sand creature tokens.
Prime Dune-Brood costs {2} less to cast for each
time you've cast it this game.