Nicol Bolas, The Infected

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

Flash, flying, hexproof

Whenever Nicol Bolas, The Infected deals combat damage
to a player, each player discards their hand. You draw a
card for each player who discarded a card this way.

Whenever an artifact enters the battlefield, you may cast
Nicol Bolas from your graveyard. If you do, return it to
the battlefield transformed into Nicol Bolas, The Fallen.