Guardian Project (Promo Pack) [Ravnica Allegiance Promos] Elemental Incarnation Enchanted creature can't be blocked

Enchanted creature can't be blocked except by Walls

Set: Unhinged Type: Creature — Donkey Zombie Rarity: Common Cost: {2}{B}{B} {1}{B}

Dragons Type: Instant Rarity: Common Cost: {2}{R} Add {R}{R}{R}{R}{R}

change Halfdane's base power and toughness to the power and toughness of target creature other than Halfdane until the end of your next upkeep

and no one can tell us why

Guardian Project (Promo Pack) [Ravnica Allegiance Promos] Elemental Incarnation Enchanted creature can't be blockedSet: Ravnica Allegiance Promos Type: Enchantment Rarity: Rare Cost: {3}{G} Whenever a nontoken creature enters the battlefield under your control, if it doesn't have the same name as another creature you control or a creature card in your graveyard, draw a card. Simic's strength comes from its diversity.