01/05/2009One of the five artifacts you sacrifice may be Time Sieve itself.
Source: Magic gatherer
Yes, you can sacrifice a creature at any time in Magic: The Gathering as long as you have a card or ability that allows you to do so.
Yes, in a game of Magic: The Gathering, you can have multiple planeswalkers on the battlefield at the same time.
No, in Magic: The Gathering, each creature can only block one attacker at a time.
No, emblems in Magic: The Gathering do not stack. Each player can only have one emblem of a specific type at a time.
You can play instants during a game of Magic: The Gathering at any time, even during your opponent's turn.
No, you can activate abilities in Magic: The Gathering at any time you have priority, not just during your main phase like a sorcery.
In a game of Magic: The Gathering, there can be multiple planeswalkers on the field at the same time, but each player can only control one planeswalker with the same subtype.
Most of the time : yes.
Enchantments in Magic: The Gathering can stack if they have different names and do not have conflicting effects. Multiple enchantments with different abilities can be on the same creature or player at the same time.
Enchantment abilities in Magic: The Gathering can be activated at any time you could cast an instant spell, unless stated otherwise on the card.
Yes, you can have two planeswalkers in play at the same time in Magic: The Gathering.
In Magic: The Gathering, the keyword "defender" means that a creature cannot attack, but it can block multiple attacking creatures at the same time.