Thats the true power of Ketromose
Best of all, you arent limited to your own creatures, so if your opponent plays something generically powerful or packaged with a useful ETB effect, slap a coin counter on it, kill it off, take it for yourself, then slap another coin counter on it to repeat the process if it survives to your end step
The idea behind it was that you spent the first two chapters building up a resource (your life total) that you then used during the final chapter
Izzet Control is currently dominating Standard which is influencing the price of this card further
I had the good fortune of opening Mox Amber in a pack recently, so I think Ill include it here
Untap and youre golden, drawing minimum two extra cards per turn