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Rules guide · Instant

Biosynthic BurstHow it works & interactions with other cards

By the ManaCount desk· 2 min read· Edge of Eternities· August 1, 2025
Carte Magic Biosynthic Burst

Biosynthic Burst 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.

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Official card text

Put a +1/+1 counter on target creature you control. It gains reach, trample, and indestructible until end of turn. Untap it. (Damage and effects that say "destroy" don't destroy it.)

Complete guide

Biosynthic Burst is a versatile green instant that offers both offensive pressure and defensive resilience for a single creature. By combining a permanent stat boost with a suite of keywords, it transforms a simple blocker into an unstoppable force.

What It Does

When you cast Biosynthic Burst, you target a creature you control. Upon resolution, that creature receives a +1/+1 counter and three powerful keywords: reach, trample, and indestructible. Finally, the creature is untapped, allowing it to serve as a surprise blocker or benefit from a second use of an activated ability.

Step-by-Step Resolution

First, you choose a legal target creature you control. As the spell resolves, the +1/+1 counter is placed first. Then, the continuous effects granting reach, trample, and indestructible are applied; these last until the end of the current turn. Finally, the creature is untapped. If the target is no longer legal when the spell tries to resolve, the entire spell fails and none of the effects occur.

Common Mistakes

A common error is forgetting that indestructible does not prevent a creature from being sacrificed or having its toughness reduced to zero or less. Also, remember that since the untap happens as part of the spell's resolution, you cannot tap the creature for a 'mana ability' in the middle of the spell's effects to get extra value; the sequence is fixed.

When to Play It

This card is best used as a combat trick. Use it after an opponent has declared attackers to untap a creature and block with reach, or cast it in response to a removal spell to save your creature with indestructible. It also excels during your own turn to help a creature punch through blockers using trample.

Interaction examples

Surviving Destruction

If an opponent casts Beast Within targeting your creature, you can cast Biosynthic Burst in response. Biosynthic Burst resolves first, giving your creature indestructible. When Beast Within tries to resolve, the 'destroy' effect fails to destroy your creature, though the opponent still receives the 3/3 Beast token.

Stacking Protections

If you have a creature targeted by a spell that exiles, Biosynthic Burst alone won't save it because it only provides indestructible. However, by casting Heroic Intervention as well, your creatures gain hexproof. The combination of Biosynthic Burst's counter and keywords along with Heroic Intervention's board-wide protection makes your creature nearly impossible to interact with.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Biosynthic Burst

Original English text — Wizards of the Coast / Scryfall

No additional ruling has been published for this card.

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Legal formats

standardfuturehistorictimelessgladiatorpioneermodernlegacypaupervintagecommanderoathbreakerstandardbrawlbrawlcompetitivebrawlalchemypaupercommanderdueltlr
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