Omnath, Locus of R&D

Omnath, Locus of R&D can't be countered.
Dredge 10
When Omnath, Locus of R&D enters the battlefield each opponent discards 1 card for each
color of Mana spent to cast Omnath, Locus of
R&D. For each card discarded in this way you
draw a card.
Landfall - Target opponent losses the game.