Helm of Chatzuk [Summer Magic / Edgar] Skeleton Set: Legends Type: Artifact Rare

Set: Legends Type: Artifact Rare Cost: {6} {4}

they remove a time counter

you may search your library for a colorless creature card with converted mana cost 7 or greater

Set: Conspiracy: Take the Crown Type: Legendary Creature — Elf Scout Mythic Cost: {1}{G}{G} Whenever another creature enters the battlefield

Femeref tutor

Helm of Chatzuk [Summer Magic / Edgar] Skeleton Set: Legends Type: Artifact RareSet: Summer Magic Edgar Type: Artifact Rare Cost: {1} {1}, {T}: Target creature gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding a player controls are blocking or being blocked by a creature, that player divides that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)