I mean who hasn’t wanted to use Safe Zone with B.E.S.

Instructor: ハルジア
Favorite Card: “Boss Rush”
Deck: “B.E.S.” Deck

1 B.E.S. Big Core
2 B.E.S. Big Core MK-2
3 B.E.S. Big Core MK-3
2 B.E.S. Blaster Cannon Core
2 B.E.S. Tetran
1 B.E.S. Crystal Core
1 B.E.S. Covered Core
2 Planet Pathfinder

3 Boss Rush
3 B.E.F. Zelos
1 Enemy Controller
1 Limiter Removal
2 Mausoleum of the Emperor
1 Terraforming
1 Set Rotation
1 Blockout Curtain
1 Cosmic Cyclone
3 Dark Hole
3 Pot of Extravagance

2 Safe Zone
2 Back to the Front
1 Metaverse

2 Number 9: Dyson Sphere
1 Phantom Fortress Enterblathnir
2 Dingirsu, the Orcust of the Evening Star
3 Number 24: Dragulas the Vampiric Dragon
2 Constellar Ptolemy M7
2 Beat Cop from the Underworld
3 Black Luster Soldier – Soldier of Chaos

Deck Concept:

The effect of “B.E.F. Zelos” can add “Boss Rush” from the Deck to your hand, which has the effect that during the End Phase of a turn that a “B.E.S.” monster is destroyed, you can Special Summon a “B.E.S.” monster from your Deck.

Activate it, Special Summon a “B.E.S.”monster from the Deck, you can then destroy it with the effect of your own “Dark Hole”.

You can then protect your Special Summoned “B.E.S.” monster from cards with the effects of “Safe Zone” or “Blockout Curtain”.

Source