Graft

Graft is a keyword ability, introduced in Dissension expansion, that is associated with the Simic guild, and works by allowing a creature with graft to move a +1/+1 counter from itself onto a creature that just entered the battlefield. Thus far, only creatures that are aligned with the Simic guild (green and/or blue) have graft. The only non-creature card with graft is Llanowar Reborn from Future Sight.

Rulings

 * All creatures with graft in Dissension are 0/0 creatures. When the last +1/+1 counter is moved off of it, it will be put into its owner's graveyard as a state-based effect unless some other effect is boosting its toughness.
 * Graft's triggered ability triggers each time a creature enters the battlefield, regardless of who controls the new creature. A player may move a +1/+1 counter onto another player's creature this way.
 * When a creature enters the battlefield, all graft abilities will trigger. The controllers of those abilities choose, one at a time as those abilities resolve, whether to move a counter. A creature that has just entered the battlefield may receive multiple +1/+1 counters this way.
 * Graft isn't targeted. The ability can move a counter onto an untargetable creature or a creature with protection from creatures.
 * The counter moved off a creature with graft as the graft ability resolves doesn't have to be one of the counters put on the card as a result of the graft ability. It can be any +1/+1 counter on it. No other types of counters may be moved this way.
 * If a permanent with graft isn't a creature when a new creature enters the battlefield, the graft ability will still trigger and a +1/+1 counter may still be moved.
 * If a creature with graft and another creature enter the battlefield simultaneously, the graft ability will trigger. The ability's controller may move a +1/+1 counter onto the other creature.
 * Many creatures with graft also have an activated ability that targets a creature with a +1/+1 counter on it. In most cases, that means it can target itself. The target creature may have any number of +1/+1 counters on it. The target creature doesn't need to have graft.
 * If the target of such an activated ability loses all its +1/+1 counters before the ability resolves, the ability will not be resolved for having an illegal target. If the targeted creature loses all its +1/+1 counters after the ability resolves, it won't lose the bonus it was granted by the ability.

Cards that contain the graft ability

 * Aquastrand spider
 * Cytoplast Manipulator
 * Cytoplast Root-kin
 * Cytospawn Shambler
 * Helium Squirter
 * Llanowar Reborn
 * Novijen Sages
 * Plaxcaster Frogling</c>
 * Simic Basilisk</c>
 * Simic Initiate</c>
 * Sporeback Troll</c>
 * Vigean Graftmage</c>
 * Vigean Hydropon</c>