The once per turn restriction is probably needed to keep it from going infinite with something that ETB makes tokens
Equip abilities being used at instant speed and paying zero for the first equip ability are both awesome, but being able to bring back an Equipment from the graveyard and put it onto the battlefield when it enters the battlefield is really what pushes it over the top
Caltrops is also your ace in the hole, because it triggers The Incredible Hulk's Enrage ability, which can lead to endless combat turns and an infinite combo game win provided you've managed to give him Indestructible
Mew ex (Psychic / Mythical Island) Mew's main advantage is the fact that, for three energy, you can copy the opponent's moveset and use it against them
Serperior The intimidating, yet majestic Lord of the Forests Regal Command attack rewards Trainers who keep a full Bench by doing 20 damage for each of your Pokmon in play
Deck construction and strategy are central activities, with the game serving both as a teaching tool for newcomersthanks to stepbystep tutorials on summoning mechanicsand as a sandbox for veterans to experiment with archetypes and tactics