Heres my Horus deck I modified up for the April Ban list with a splash of Soul COntrol and Side Deck adds more Soul Control to the deck with a Frog as an alternative to Soul Exchange.

Horus' Negation 41 Cards

19x Monsters
2x Nomi
2x Horus The Black Flame Dragon LV8

3x Tribute
2x Horus The Black Flame Dragon LV6
1x Mobius The Frost Monarch

15x Non-Tribute
1x Horus The Black Flame Dragon LV4
2x Spirit Reaper
2x Magician of Faith
1x Twin Headed Behemoth
1x Masked Dragon
1x Sangan
1x D. D. Warrior Lady
2x Spear Dragon
1x Dark Mimic LV1
2x Mirage Dragon

15x Spells
2x Smashing Ground
2x Rush Recklessly
2x Nobleman of Crossout
1x Graceful Charity
1x Mystical Space Typhoon
1x Snatch Steal
1x Swords of Revealing Light
1x Soul Exchange
1x Premature Burial
1x Heavy Storm
2x Stamping Destruction

7x Traps
1x Mirror Force
1x Call of the Haunted
2x Royal Decree
2x Sakretsu Armor
1x Torrential Tribute

Side Deck
1x Dark Ruler Ha Des
1x Elemental Hero Wildheart
1x Horus The Black Flame Dragon LV6
1x Jinzo
1x Mobius The Frost Monarch
1x Mystic Swordsman LV2
1x Treeborn Frog
1x Zaborg The Thunder Monarch
1x Soul Exchange
1x Metamorphosis
1x My Body as a Shield
2x Divine Wrath
2x Solemn Judgement

You should consider dropping the Horus LV4 and sending the Sakuretsu Armors to the side deck. With 2 Royal Decree, you may have trouble getting some of those to work. So...
-1 Horus LV4
+1 Masked Dragon

and switch between main and side decks:
Sakuretsu Armor x2 for
Treeborn Frog and My Body as a shield