You have the original blue one in
Morphling 
. You have the colorshifted Time-Spiral block one in
Torchling 
. You have the Alara block green one in
Thornling 
(and
the parody card 
). Now, I give you the last two 'lings. Swordling is 4/4 like Thorny, Mortling's abilities are a little better, so it's 3/3 like the first two.
Swordling 
Creature-Shapeshifter
: Untap Swordling (
Alternately, it gains vigilance until end of turn)
: Swordling gains lifelink until end of turn
: Swordling gains protection from the color of your choice until end of turn
: Swordling gets +1/-1 until end of turn
: Swordling gets -1/+1 until end of turn
4/4
Mortling 
Creature-Shapeshifter
: Mortling gains intimidate until end of turn
: Mortling gains deathtouch until end of turn
: Regenerate Mortling
: Mortling gets +1/-1 until end of turn
: Mortling gets -1/+1 until end of turn
3/3
FYI, if you want a second creature type for each, consider Swordling to be a Knight and Mortling to be a Zombie
