9 pocket pokemon card binder bulbasaur Venusaur Pokémon Center × Fossil: Bulbasaur

Through the Water Shuriken ability, Greninja offers 20 chip damage (another 20 with a second Greninja), putting immense pressure on the opponent

Add on top of that evasion, ward, and getting a +1/+1 each time Valgavoth triggers that card draw, and you've got the perfect commander to build a red/black deck around.

For Speed Duels, Varis uses various DARK Dragon monsters such as "Dragonoid Generator", "Gateway Dragon" and "Sniffer Dragon" to swarm the field and set up Link Summons for various Dragon Link Monsters, such as "Triple Burst Dragon" and "Flash Charge Dragon" and the Cyberse "Topologic" Link Monsters he obtains through his Storm Access Skill

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With the upcoming ban on Lysandres Trump Card, I also prefer discarding two Energy to having to discard five cards from the deck

A little more mana, and you have Savage Beating