Thermalily

The Thermalily is a generating flower added by Botania. It generates Mana by consuming Lava. According to the Lexica Botania, it is primarily intended to be used as an 'emergency' Mana source, rather than for a continuous supply.

The Thermalily consumes Lava source blocks to generate very large amounts of Mana. It searches the same way as a Hydroangeas, all 4 directions and diagonals at the same altitude. After consuming a block of Lava, a Thermalily will produce 20 Mana per tick for 900 ticks (producing a total of 18,000 Mana), then go on cooldown for 6,000 ticks (5 minutes).

A Thermalily can store 900 Mana internally, and can be bound to a Mana Spreader within 6 blocks of itself to transfer its Mana.

Trivia

 * The flower's flavor text refers to Blood Magic's Serenade of the Nether ritual, which was often used to provide Lava to Thermalilies.