And asking do you pay the 3 sounds infinitely sweeter on Sentinel than do you pay the 1
It affects all your creatures and gives them trample though, so can you really complain all that much
Losing access to any form of direct tutoring (no Transmute Artifact, no Demonic Tutor) means that assembling the various parts of a combo can be tricky, take some time and won't get you an instant win
You get the first land from your deck into play, and the rest go into your graveyard as fodder for everything from threshold to reanimation
So, I can hard cast Force of Will normally and it counts as my one-of, or exile a Blue card and a life and then alternate cast it and get another spell that turn
It makes multiple early Lander producers essential for playing more than two colors, especially when you dont have Gene Pollinator to fix your mana