you must cast the suspended card straight away, even if it means casting a creature spell in your upkeep or other unusual timing situations
That said, its card disadvantage in a format where spot removal is already card disadvantage, so whether or not you decide to run this card really depends on your meta and the sorts of commanders you play against
Positive loyalty taps a creature, negative loyalty draws cards based on the number of tapped creatures an opponent controls (hello, mass tappers), and the emblem turns your maximum hand size infinite and (optionally) returns anything that hits your graveyard to your hand
These traditional foil cardsand several other non-foil cards found insideare exclusive to the Magic: The Gathering Assassin's Creed Starter Kit and put you right in the heart of the action between you and another assassin
So if you have five extra mana hanging around after your first main phase, and you move to combat, you'll be taking five damage
Can You Proliferate Energy Counters