There will be times where you can use that extra combat step to great effect, but there will be more when you have neither the time nor the mana, nor the board state to actually make this matter Not enough nonbasic lands in the format Giving a creature firebereathing isnt particularly useful unless that creature was also pretty good, but this does replace itself, so that makes the floor on it pretty reasonable, especially for a one mana card
Lets see this combination of cards in an example: Heres Mer Man, a host creature
In a meta deck, the most important feature is the efficiency
This Pokemon is easily recognizable and is very popular among collectors and players alike
You can give a creature you plan to sacrifice a regeneration shield, it just wont do anything since regeneration only protects from lethal damage or destruction
to 6 p.m., and yes, this is real