Spells and abilities that would normally cause you to gain or lose life still resolve while your life total can't change, but the life-gain or life-loss part simply has no effect
A single Flooded Strand can thereforeif at a cost of 3 life pointstransform into a first-turn Sacred Foundry that can tap for either card on the first turn
Youre not casting a spell but activating an ability, Amphin Mutineer is not entering from the graveyard so neither of these cards will stop you
What are the costs of mulliganing, or of keeping a bad hand
Mono red decks will have a hard time setting up for this combo, as they dont have reliable ways to find the pieces, but if you add blue or black, tutors like Trinket Mage and Vampiric Tutor can help you assemble the pieces without slowing you down, ensuring you are able to keep up with early mana rocks and ramp spells with ease
His sacrifice ability is something I love to have in creature decks, and Ive long played cards like Selfless Spirit and even Dauntless Escort to get this effect