Key to the City

When it enters the realm, and at the start of its controller's turn.

Site abilities cannot target, damage, destroy, banish, modify, move, or impede the movement or attacks of the bearer of the Key. Additionally, site abilities cannot cause the bearer to lose or gain life, and cannot affect healing the bearer receives. For example: Gnome Hollows will not stop a 3+ power Key bearer from entering. A Key bearer can walk over a Perilous Bridge on the ground. Remote Desert will not damage a Key bearer. Poisoned Well cannot cause the bearer to lose life. An Avatar Key bearer will not gain life from Holy Ground or lose life from Poisoned Well. An Avatar Key bearer will not have its healing reduced by River of Blood. (The Avatar itself must hold the Key to ignore the half healing effect from River of Blood.) Fields of Camlann will not destroy a Key bearer, even when it's not the chosen minion. River Rapids can't move a Key bearer. Many site effects won't apply, as part of 'can't be modified': Gilman House can't transform a Key bearer Babbling Brook can't disable a Key bearer Bog can't immobilize a Key bearer Silent Hills can't silence a Key bearer Road to Perdition can't increase or decrease a Key bearer's power Accursed Desert can't break a Key bearer's Ward Some site abilities will continue to work: Wizard's Den will still allow a Key bearer Avatar to draw a spell (since players actually draw spells, not units). Garden of Eden will still stop a Key bearer Avatar from drawing extra spells (since players actually draw spells, not units). Beacon will still count an enemy Key bearer. Asmodeus with the Key still can't destroy a Bedrock. A Key bearer Avatar will still have to pay 2 extra for Bureau of Occult Control, since gaining and paying mana is done by the player. A Key bearer Avatar will still be able to use the threshold provided by The Empyrean's site ability, since tracking threshold is done by the player. The Void site would still banish a non-voidwalk minion Key bearer, since the game itself is banishing the minion.

The Flooded ability gives a site a minimum of 1 water threshold, making it a water site. Even a bearer of Key to the City will see the water threshold and treat it as a water site. e.g. It will die in the subsurface if it doesn't have Submerge, it can't be forcefully Burrowed, etc.