Coram, the Undertaker

Coram's first ability applies only while it is on the battlefield. In all other zones, its power is 0.

If you play a land, cast a spell, or both using the permission granted by Coram's last ability and then have a new Coram come under your control in the same turn, you can still play a land, cast a spell, or both using the new Coram's permission.

Once you begin to cast a spell this way, losing control of Coram won't affect it. You can finish casting it as normal.