When Wurmcoil Engine dies, it and Moldervine Reclamation trigger.
Resolve the Wurmcoil Engine trigger, creating two 3/3 Wurm artifact creature tokens.
Resolve the Moldervine Reclamation trigger, causing you to gain 1 life and draw a card.
Activate Phyrexian Altar twice by sacrificing the Wurm tokens, adding ({B} magic symbol) ({B} magic symbol) .
When the Wurms die, Moldervine Reclamation trigger twice, causing you to gain 2 life and draw two cards.
Activate Chainer by paying ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) and 3 life, putting Wurmcoil Engine from your graveyard onto the battlefield.