When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls. {4}, {T}: Proliferate, then proliferate again.
Whenever you're dealt combat damage, the attacking player gains control of Contested Game Ball and untaps it. {2}, {T}: Draw a card and put a point counter on Contested Game Ball. Then if it has five or more point counters on it, sacrifice it and create a Treasure token.
Whenever a creature deals combat damage to you, that creature's controller gains control of Contested War Zone. {T}: Add {C}. {1}, {T}: Attacking creatures get +1/+0 until end of turn.
Dynastic Command Node — As long as you control your commander, activated abilities of cards in your graveyard cost {2} less to activate. This effect can't reduce the mana in that ability's activation cost to less than one mana. Translocation Protocols — {3}, {T}: Mill three cards.
{2}, {T}: Exile target artifact card from a graveyard. Put a charge counter on Conversion Chamber. {2}, {T}, Remove a charge counter from Conversion Chamber: Create a 3/3 colorless Phyrexian Golem artifact creature token.
{TK}{TK} — When this permanent leaves the battlefield, draw a card. {TK}{TK}{TK}{TK}{TK} — Whenever a creature enters the battlefield under your control, this permanent becomes a 13/13 Eldrazi creature in addition to its other types until end of turn. {TK}{TK} — 4/2 {TK}{TK}{TK}{TK} — 5/6