Opponents can not block and kill creatures you control.
Steps
Declare
Najeela and
Bloom Tender as attackers.
Najeela and
Raggadragga's second ability triggers.
Resolve the
Najeela trigger, creating a 1/1 Warrior creature token that is tapped and attacking.
Resolve the
Raggadragga trigger, untapping
Bloom Tender.
Activate
Bloom Tender by tapping it, adding ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) that cannot be spent to pay generic mana costs.
Activate
Najeela by paying ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.
Repeat each combat phase.
Results
Infinite combat phases.
Infinite creature tokens.
Infinite ETB.
Infinite lifegain.
Infinite lifegain triggers.
Metadata
In 32 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).