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Vision HERO Multiply Guy X DARK Level 3 [ Warrior / Effect ] ATK 800 DEF 700 If you take battle or effect damage while this card is in your GY: You can place this card from your GY in your Spell & Trap Zone as a face-up Continuous Trap

Raidraptor - Nest X SPELL Continuous If you control 2 or more "Raidraptor" monsters: You can add 1 "Raidraptor" monster from your Deck or GY to your hand

However, its worth mentioning that some effect cards can only happen at certain timings of the damage step, which they usually mention explicitly in their descriptions

Either your card advantage will help you win the game before Phyrexian Arena squeezes the last points out of your life total, or you can offset this life loss by playing cards that gain life