Arcane Spyglass
{4}
Artifact
{2}, {T}, Sacrifice a land: Draw a card and put a charge counter on ~this~.
Remove three charge counters from ~this~: Draw a card.
Chimeric Egg
{3}
Artifact
Whenever an opponent casts a nonartifact spell, put a charge counter on ~this~.
Remove three charge counters from ~this~: ~this~ becomes a 6/6 Construct artifact creature with trample until end of turn.
Golem Foundry
{3}
Artifact
Whenever you cast an artifact spell, you may put a charge counter on ~this~.
Remove three charge counters from ~this~: Create a 3/3 colorless Golem artifact creature token.