strongest card in yugioh Yu-Gi-Oh!: The 10 Most Powerful Dragon Cards, Ranked Yugi's 15 Strongest Cards Throughout

It has an activated ability for 1B to sacrifice a creature and gain four life, so you can avoid paying the penalty on your own turn

it's an upgrade

If you play it in Red/Green, where you have access to a ton of mana and are packing some heavy critters, the right three cards in the graveyard option can win you the game, and in your hand can also win you the game

Turn it face up any time for its mana cost if it's a creature card.) The ninjutsu ability can be activated only after blockers have been declared

Gyarados ex can be obtained from Wisdom of Sea and Sky: Lugia pack in the Wisdom of Sea and Sky set

If you activate the mana ability of Shaun & Rebecca, Agents while in the process of casting a spell, activating an ability, or during a window to activate mana abilities when you're asked to pay a cost during the resolution of a spell or ability, you won't mill cards right away