My Undead Horde Awakens (Schemes) [Archenemy Schemes] SH4 or do you need to

or do you need to hold back with smaller blockers

Set: XY: Generations Type: Lightning Rarity: Uncommon Retreat cost: Colorless

Set: EX: Team Magma vs Team Aqua Type: Fire

Set: EX: Crystal Guardians Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

the Walking Grave

My Undead Horde Awakens (Schemes) [Archenemy Schemes] SH4 or do you need toSet: Archenemy Schemes Type: Ongoing Scheme Rarity: Common (An ongoing scheme remains face up until it's abandoned.) At the beginning of your end step, you may put target creature card from an opponent's graveyard onto the battlefield under your control. When a creature put onto the battlefield with this scheme dies, abandon this scheme.