At the beginning of your upkeep, draw a card. {T}: This artifact deals 1 damage to any target.

{T}: Add {W}. This land deals 1 damage to you. Threshold — {W}, {T}, Sacrifice this land: You gain 4 life. Activate only if seven or more cards are in your graveyard.

Prevent all damage that would be dealt to you and permanents you control this turn by sources you don't control. If damage is prevented this way, you may have Channel Harm deal that much damage to target creature.