Phial of Galadriel

If an effect would set your life total to a specific number that's higher than your current life total, that effect causes you to gain life equal to the difference. If your life total is 5 or less, Phial of Galadriel will then double the amount of life that effect would cause you to gain. For example, if you have 3 life and an effect says that your life total "becomes 10," you would gain 7 life which Phial doubles to 14, so your life total will actually become 17.

In a Two-Headed Giant game, life gained by your teammate won't cause Phial of Galadriel's second ability to apply, even though it will cause your team's life total to increase.

Any time you are instructed to draw more than one card, you draw them one at a time. For example, if you control Phial of Galadriel and have no cards in hand and you're instructed to "draw two cards," your first card draw is replaced by drawing two cards, then you'll draw the second card from the original instruction. In total, you'll draw three cards.