Its not quite Eternal Witness since it can only grab permanents, but in Limited thats not much of an issue
Dual lands like Silent Clearing and Caves of Koilos can also tap for colored mana immediately at the cost of some life, but this isnt a huge deal in a lifegain deck
All have been played against me.
The stats arent gaudy, but getting a body onto the battlefield is better than spending your turn two effectively doing nothing
Cards such as Accursed Marauder, Fleshbag Marauder, and Merciless Executioner all accomplish this, and have a mana value of three or less, allowing Squall to bring them back and force another mass sacrifice every time it connects for damage
We've also seen others that don't: That doesn't necessarily devalue the location as there's one more symbol we need to talk about, which is the lore symbol, which is located on the right-hand side of the card next to printed abilities and/or flavor text