Eye of a God

When Eye of a God enters the battlefield if you payed life to play it then X is halved (choose the lower side if needed)
Eye of a God enters with X +1/+1
counters on
When Eye of a God enters the battlefield all creatures that have 1 counter gain X more
counters
If you pay life then 4 mana must be taped before you can pay(includings Eye of a God)