Harmony of Nature [The List] Bat and "At the beginning of

and "At the beginning of your upkeep

Set: Shadowmoor Type: Artifact Creature — Scarecrow Rarity: Rare Cost: {2} As Painter's Servant enters the battlefield

Set: Urza's Destiny Type: Enchantment Rarity: Rare Cost: {2}{W}{W} Each other non-Aura enchantment is a creature in addition to its other types and has base power and base toughness each equal to its converted mana cost

This was no execution

creatures can't block unless their controller pays 1 for each of those creatures

Harmony of Nature [The List] Bat and "At the beginning ofSet: The List Rarity: Uncommon Tap any number of your creatures. You gain 4 life for each creature tapped this way. (Tapped creatures can't block.)