Battletide Alchemist

• WWizards of the Coast2008-04-01
  Official Ruling
  If a source would deal damage to multiple players at the same time, you may prevent X damage that source would deal to each of those players. The choice for each player is made separately.
• WWizards of the Coast2008-04-01
  Official Ruling
  You count the number of Clerics you control at the time the damage would be dealt.
• WWizards of the Coast2008-04-01
  Official Ruling
  If the same source would deal damage to a player at different times, you may prevent X of that damage each time.

Rulings via Scryfall