Lotleth Giant Rules

For each time a zombie is destroyed add a counter on this card
once five counters have been added Summon
Lotleth Giant. and give it devour.
Once Lotleth Giant has been summoned
and is a 12/10
each turn you may pay {2} if you do
place a move counter on Lotleth Giant
If Lotleth Giant reaches the mage tower players
have only ten turns to stop it if they can not
the tower will be destroyed