Omnath, Locus of Creation One could argue that gaining life is the least of what Omnath, Locus of Creation can do, and that would be fair
Meriadoc Brandybuck | Illustration by Marie Magny Halflings are creatures in Magic with the halfling subtype, centered very heavily in green, white, and black
Dinosaurs are often aggressive, high-power/toughness creatures with combat on the mind
If you want off-color lifegain, look at Bottle Gnomes, Filigree Familiar, Fountain of Renewal, Ivory Tower, Navigators Compass, or any other of dozens of artifact cards that gain life at two to three mana
There are many different kinds of robots, so you can determine what "robot voice" means to you, though it should probably sound different from your regular voice (unless you're a robot, I suppose, in which case I for one welcome our new robot overlords)