You can still lose the game for other reasons, including having ten or more poison counters or drawing a card from a library with no cards in it
So, getting your creatures to a good size and swinging out is hard to deal with
However, these decks have a phenomenal piece of utility to work around retreat locking, which is especially important in the current meta
Modified is going to show up in most color combinations with +1/+1 counter themes, but it is especially necessary for red
Youve got all the snow lands at your disposal, and Dark Depths gives you the Marit Lage win condition (big, scary flier)
Sadly, Haliya only draws cards on your end step, which does limit the cards effectiveness somewhat