This opens up the door to a huge array of powerful combos, but its completely viable in fair decks as well, easily ramping out a power play or two on Treasure mana alone
If youre turning lots of creatures face-up, that lifegain might add up
For example, suppose a creature, player, or planeswalker has protection from my lifelink creature
Hope Estheim WU Bishop's Soldier isnt a terrible rate, but I wouldnt expect to mill anyone out with Hope Estheim
Your opponents will be playing a Goblin Guide, Slippery Bogle, Ornithopter, Glistener Elf, or Noble Hierarch on turn 1, and if thats the case, our deck has to be nothing but slaughter early on with a planeswalker finish