Do-It-Yourself Seraph — ruling 1

If Do-It-Yourself Seraph has the text box of another card, it has all the abilities and flavor text of that card.

Do-It-Yourself Seraph — ruling 2

If anything cares about the text of Do-It-Yourself Seraph, consider all of its text boxes as if they were one.

Do-It-Yourself Seraph — ruling 3

If Do-It-Yourself Seraph leaves the battlefield, it loses any text boxes it gained. If it returns to the battlefield, it will be a new object and won't have those text boxes, either.

Do-It-Yourself Seraph — ruling 4

If Do-It-Yourself Seraph has abilities that contradict one another, the most recently added one wins. For example, if Do-It-Yourself Seraph has the text boxes of both Beast of Burden (power and toughness equal to the number of creatures on the battlefield) and Psychosis Crawler (power and toughness equal to the number of cards in your hand). Do-It-Yourself Seraph's power and toughness would be defined by the text box added most recently.

Do-It-Yourself Seraph : règles, fonctionnement et interactions (MTG)

Do-It-Yourself Seraph is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Flying Whenever this creature attacks, you may search your library for an artifact card, exile it, then shuffle. This creature has the text box of each card exiled with this creature in addition to its own.

How it works : Do-It-Yourself Seraph

Original English text — Wizards of the Coast / Scryfall

#1January 19, 2018· Wizards of the Coast
If Do-It-Yourself Seraph has the text box of another card, it has all the abilities and flavor text of that card.
No other card is named in this ruling.
#2January 19, 2018· Wizards of the Coast
If anything cares about the text of Do-It-Yourself Seraph, consider all of its text boxes as if they were one.
No other card is named in this ruling.
#3January 19, 2018· Wizards of the Coast
If Do-It-Yourself Seraph leaves the battlefield, it loses any text boxes it gained. If it returns to the battlefield, it will be a new object and won't have those text boxes, either.
No other card is named in this ruling.
#4January 19, 2018· Wizards of the Coast
If Do-It-Yourself Seraph has abilities that contradict one another, the most recently added one wins. For example, if Do-It-Yourself Seraph has the text boxes of both Beast of Burden (power and toughness equal to the number of creatures on the battlefield) and Psychosis Crawler (power and toughness equal to the number of cards in your hand). Do-It-Yourself Seraph's power and toughness would be defined by the text box added most recently.
No other card is named in this ruling.