If multiple effects modify your hand size, apply them in timestamp order. For example, if you put Spellbook (an artifact that says you have no maximum hand size) onto the battlefield and then put Null Profusion onto the battlefield, your maximum hand size will be two. However, if those permanents entered in the opposite order, you would have no maximum hand size.
2007-02-01
wotc
Your maximum hand size is checked only during the cleanup step of your turn. At any other time, you may have any number of cards in hand.
2007-02-01
wotc
The triggered ability will trigger when you play a land card or cast a nonland card as a spell. It won't trigger when you play a copy of a card, such as with Isochron Scepter.
2007-02-01
wotc
Countering a spell that has been cast will not prevent you from drawing the card.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Not Legal
Timeless
Not Legal
Gladiator
Not Legal
Pioneer
Not Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Not Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Legal
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