Better relentless wording

{1}{r}{t}: Double the power of target creature until end of turn.
You may tap creatures you control instead of paying the relentless cost of permanents you control.
Relentless {2}{r}{r}. (Instead of Tapping Better relentless wording you may pay {2}{r}{r}, if you do, do not tap Better relentless wording. This ability costs {2}{r}{r} for each time after the first)