Paradox Engine [Aether Revolt] Human Bird Oketra the True can't attack

Oketra the True can't attack or block unless you control at least three other creatures

If a land card is discarded this way

Set: Friday Night Magic 2006 Type: Sorcery Rarity: Rare Cost: {1}{B} Target player sacrifices a creature

then discards two cards

Set: Unlimited Edition Type: Artifact Creature — Beast Rarity: Rare Cost: {6} Clockwork Beast enters the battlefield with seven +1/+0 counters on it

Paradox Engine [Aether Revolt] Human Bird Oketra the True can't attackSet: Aether Revolt Type: Legendary Artifact Rarity: Mythic Cost: {5} Whenever you cast a spell, untap all nonland permanents you control. "One look at this glorious item convinced me that Kaladesh deserved my full attention. Sure enough, my time here has yielded exquisite fruit." Tezzeret