From LOTR-TCG Wiki

Recursion is an informal game term. "Recurring" a card is playing a card you'd typically think of as disposable (like an event or minion) many times, usually because of an effect that puts that card into your hand or into play from the Discard pile, or a card that stacks other cards on itself in lieu of sending them to the discard pile.

For example, Moria Shadow decks recur Goblin Scimitar (1C180) many times, to draw cards and generate extra Twilight with (multiple copies of) Goblin Armory (1R173) . You can only have four copies of Goblin Scimitar, but they replay them many more times than that, by playing and recurring Goblin Scavengers (1C179) . They recur the Scavengers by using They Are Coming (1C196) , Host of Thousands (1C187) , and Goblin Swarms (1R183) .

Another common example of recurring cards is the Dwarven strategy using Preparations (7R12) . Slaked Thirsts (7U14) can be played when stacked on a condition, and Sindri, Dwarven Lord (9R10) will let you play and replay any skirmish event you want.

Game Setup Starting FellowshipBiddingMulligan
Deck Building Considerations UniquenessX-ListR-ListErrataFormat
General Strategies BeatdownBombCorruptionHand ExtensionRun/StopSkirmish CancellationSwarmWin ConditionWound PreventionWounding
Deck Archetypes Auto-Corruption BombBeasterlingsBerserkersBouncing HobbitsElventsForestgulsHobbit HospitalFruit LoopsGondor KnightsGondor RangersGondor WraithsMoria ArcheryMoria BeatdownMoria NavyMoria SwarmMoria TentaclesNazgul BeatdownNinja GollumOrc CorruptionRainbow WoundingSauron GrindSauron InitiativeSauron RoamingSauron ThreatsSolo SmeagolSouthron ArcherySouthron InitiativeStupid SwarmSuper FriendsTelepathyThreatgulsToken TanksTroll SwarmUruk ArcheryUruk MachinesUruk TrackersWarg Super Swarm
Rules Rule of 4Rule of 9
Mechanics BearDiscardDraw DeckExertExhaustedFellowshipInitiativeIn Play/Leave PlayMove LimitReconcileRoamingSite ControlSpotStackSupport AreaThreats
Gameplay Terms BoatBodyBroken/NPE/OPBuff/NerfChokeComboCultural EnforcementCyclingDead DrawFetchFilterFloodGrindHand ClogHateInteractionItemLoopMatchupMetaMillNewbie TrapPilePower CreepPumpRainbowRecursionRemovalResourceRogueRule of 6SideSite ManipulationSpeed BumpSplashSubcultureTankOther Terms