If an effect allows an opponent to cast spells any time they could cast an instant (for example, if your opponent also controls Teferi), the restriction of Teferi's last ability takes precedence over that permission
Lightning, Army of One Rarity: Mythic Rare TYPE: Legendary Creature SUBTYPE: Human Soldier CMC: 3 Mana cost: USD: $23.03 EUR: 18.80 TIX: 0.14 EDHREC RANK: 2663 (3/2) First strike, trample, lifelink Stagger Whenever Lightning deals combat damage to a player, until your next turn, if a source would deal damage to that player or a permanent that player controls, it deals double that damage instead
Big Eldrazelephant in the room though: The price gouging is far from justified for this precon and might hurt its availability and long-term reputation
Mind Screw: Obtaining the Clasp of Black Onyx in Echoes of the Past will allow Daniel to join forces with you, but failing to get it will lead him to get possessed and turn into a monster, but his enemy card will include a parley action that allow you to show him the Onyx Clasp to instantly defeat him
Its really cool and its actually fun to list cards using the scanning tool that TCGPlayer offers
The reliable access that a player has to their commander allows for unique strategies to take form with entire game plans often centering around the use of that single specific card