Arcane duplication

When arcane duplication enters the batlefield, chose an "enters the batlefield" efect umong creatures you control.
{2}{u/r}{r/w}{w/u}: activate the chosen "enters the batlefield" efect and put a fate counter on Arcane duplication, then if it has three or more fate counters, exile it, you gain life equal to the mana cost of the creature whose ability was chosen.
"Dindn't we see that allready ?"