For example, if Fiend Hunter's enters-the-battlefield ability is copied and two creatures are exiled, they both return when Fiend Hunter leaves the battlefield

The side deck is a work in progress, mostly you can ignore it, but I will go over it briefly if you care for it: Main Deck Total: 40 Monsters: (22) 3 Fluffal Dog 3 Edge Imp Chains 3 Fluffal Bear 2 Edge Imp Sabres 3 King of the Swamp 1 Fluffal Owl 2 Fluffal Sheep 3 Fluffal Mouse 2 Fluffal Wings Spells: (18) 2 Galaxy Cyclone 2 Frightfur Fusion 1 Raigeki 3 Fusion Conscription 2 Polymerization 2 Dark Hole 2 Dark Fusion 1 Frightfur Factory 3 Toy Vendor Extra Deck: (15) Fusions: (11) 2 Frightfur Sabre-Tooth 1 Frightfur Leo 1 Frightfur Bear 2 Frightfur Wolf 3 Frightfur Tiger 2 Frightfur Sheep XYZs: (4) 1 Constellar Ptolemy M7 1 Adreus, Keeper of Armageddon 1 Castel, the Skyblaster Musketeer 1 Wind-Up Zenmaines Side Deck: (15) 3 Gorz the Emissary of Darkness 3 Mystical Space Typhoon 3 Forbidden Chalice 3 Prohibition 3 Royal Decree Monsters: As far as the monsters go, its hard for me to say there is any possible better way to have the monster lineup in this deck

Set: Legendary Duelists Card type: Fusion/Effect Monster Rarity: Super Rare Attack: 0 Defense: 5000
Arm for Battle is a basic Boros Voltron shell that would likely end up putting Akiri, Line-Slinger and Bruse Tarl, Boorish Herder at the helm, while committing Wyleth, Soul of Steel to the 98
12 +1/+1 Counters Just Keep Stacking The humble +1/+1 counter has a long and storied history in Magic, with so many support cards that an entire deck built around them is not just a possible choice, but a great one
Others have been pretty gosh darn aggressive