Hawthor, The Last Dualicorn

Haste, Doublestrike, Lifelink, Deathtouch
Mount{1}{w}{b}(Target creature mounts Hawthor, The Last Dualicorn. Until end of turn, The two creatures are counted as one creature with the name Hawthor, The last Dualicorn(Mounted). Hawthor, The last Dualicorn(Mounted) has the abilities of both creatures and has the power of both creatures combined.)
Hawthor, The last Dualicorn's power is equal to x
The legend himself