Thopter Assembly

When this creature dies, you may draw a card.

As an additional cost to cast this spell, sacrifice a creature. Draw three cards.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Target creature gets +1/+1 and gains trample until end of turn.

Enchant creature Enchanted creature has infect. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Imprint — T: Exile target artifact card from a graveyard. This creature has all activated abilities of all cards exiled with it.

Defender Metalcraft — As long as you control three or more artifacts, this creature gets +2/+2 and can attack as though it didn't have defender.

At the beginning of your upkeep, you may put a charge counter on target artifact.