Talk:Fifth Omni Dragon Lord, Tenbu/@comment-25600444-20160511083523/@comment-6102960-20160511090317

From the rules:

"Monsters that are already on the field may also be replaced and put to the drop zone by calling a new monster on top of it. The combined size of the monsters on the field is limited to a maximum of 3. When the total size of all monsters on the fighter's field is 3 or greater, he/she must put (not destroy) monsters, except the last monster called, into the drop zone until the total size becomes 3. (This must be done before using any "When enters the field" ability.)"

Deathmodai works around this, because nutz.