You can talk to Ishihara before activating the resulting cutscene, and he says his ordinary dialogue
: This artifact becomes a 9/9 Phyrexian Construct artifact creature, loses all abilities, and gains indestructible and toxic 9
If you want to play with physical cards right away or your buddy who already has a deck is begging you to build one, you can buy a functional, powerful deck that plays right out of the box
Roshan, Hidden Magister turns all your creatures into assassins so you can benefit from typal payoffs, and its a menace enabler for your face-down creatures, too
This would remain playable with just flash or just flying, it would be fine and still see quite a lot of the action it gets now
As such, you can find charge counters on noncreature permanents, such as artifacts