Chromeshell Cultivator

Spikey Shell— Whenever Chromeshell Cultivator
is blocked, it deals 5 damage to each creature
blocking it.
Landfall— Whenever a land enters the battlefield
under your control, draw a card. Then you may
put a land from your hand onto the battlefield.
If you don't, add 1 mana of any two colors. (Treat
the mana as if it is both of those colors for anything
that cares about that stuff.)