If you control more than one legendary creature with the same name and the "legend rule" begins applying again (perhaps because Council of Reeds leaves the battlefield), you'll immediately have to comply with the rule and put all but one of those permanents into the graveyard
This card's variable casting cost allows you to put Angels on the battlefield while holding up mana for counter magic you happen to have in hand, and a single card that can fill your entire board is always a welcome inclusion in a format like Commander
Moreover, we've got a good selection of reanimation spells, from Living DeathLiving Death (155,419 decks) to the lowly ReanimateReanimate (484,613 decks)
Ends on: "Ultimate Ancient Gear Golem" + "Ancient Gear Duel" Through any of the "Ancient Gear" starters it is also possible to summon both "Chaos Ancient Gear Giant" and "Ultimate Ancient Gear Golem" (or boost "Chaos Giant" to 9000 ATK), if the opponent controls two or more monsters
Voltorb and Electrode serve as great substitutes until you get the ball rolling with your EX cards