Whenever Ayesha Tanaka, Armorer attacks, look at the top four cards of your library. You may put any number of artifact cards with mana value less than or equal to Ayesha's power from among them onto the battlefield tapped. Put the rest on the bottom of your library in a random order. Ayesha can't be blocked as long as defending player controls three or more artifacts.
{T}: Add one mana of any color among legendary creatures and planeswalkers you control.
This land enters tapped. When this land enters, you gain 1 life. {T}: Add {W} or {U}.
The first activated ability of an artifact you activate each turn costs {2} less to activate. +1: Draw two cards. Then discard two cards unless you discard an artifact card. −2: Target artifact becomes an artifact creature. If it isn't a Vehicle, it has base power and toughness 4/4. −6: You get an emblem with "Whenever an artifact you control becomes tapped, draw a card."
When The Mightstone and Weakstone enters, choose one — • Draw two cards. • Target creature gets -5/-5 until end of turn. {T}: Add {C}{C}. This mana can't be spent to cast nonartifact spells. (Melds with Urza, Lord Protector.)
Changeling (This card is every creature type.) {X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.
Flying Whenever a nontoken artifact you control enters, you may pay {1}{U}. If you do, create a token that's a copy of that artifact.
+1: Create a 1/1 colorless Thopter artifact creature token with flying. 0: Draw a card. If you control three or more artifacts, draw two cards instead. −9: You get an emblem with "At the beginning of your end step, search your library for a permanent card, put it onto the battlefield, then shuffle."