So that may not be obvious, so let's walk you through an actual combat: You attack with Laccolith Whelp Your foe blocks with Wall of Ice You can deal one damage to the Wall of Ice immediately, which prevents your combat damage later
(2017-08-25) Effects that would replace having you gain life with some other event won't be able to be applied because it's impossible for you to gain life
Learn to Play events are tailored to players who are just starting out
Honorable Mentions: Earthbending Earthbender Ascension, Ba Sing Se, Toph, Earthbending Master are great examples of earthbending and a reminder that +1/+1 counters work beautifully because even if a land stops being a creature for a time, the counters stay on it until it leaves for another zone
Who Chooses
I'd probably replace it with more targeted removal like Bloodchief's Thirst orif you have more rare wildcardsmaybe Extinction Event, which seems like it could be effective in our deck since most of our creatures are even converted-mana-cost tokens