Whenever an artifact you control enters, put a loyalty counter on Tezzeret.

[0]: Untap target artifact or creature. If its an artifact creature, put a +1/+1 counter on it.

[-3]: Search your library for an artifact card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

[-7]: You get an emblem with At the beginning of combat on your turn, put three +1/+1 counters on target artifact you control. If its not a creature, it becomes a 0/0 Robot artifact creature.